toggle menu

Home / Scientific & Educational / Astronomy

Scientific & Educational >> Astronomy Abbreviations

Look through 3189 acronyms and abbreviations related to Astronomy:

• IMHO — In My Humble Opinion
• HIV — Human Immunodeficiency Virus I
• LAN — Local Area Network
• ETA — Estimated Time of Arrival
• PPNE — Proto-Planetary Bebulae
• PNX — Pulsar Network Exchange
• HIPAA — Health Insurance Portability and Accountability Act of 1996
• FTP — File Transfer Protocol
• MM — Millimeter
• LUNNO — Lunar Upper Navigation Nacelle Orb
• COBRAS-SAMBA — Cosmic Background Radiation Anisotropy Satellite / Satellite for Measurement of Background Anisotrop
• ROM — Read-Only Memory
• WWW — World Wide Web
• ASAP — As Soon As Possible (pronounced AY-sap)
• A — Ampere
• ICD — Interface Control Document
• LASER — Light Amplification By Stimulated Emission Of Radiation (cf. Maser)
• CSA — Canadian Space Agency
• WHO — World Health Organization
• CDR — Critical Design Review
• CPU — Central Processing Unit
• SAR — Search And Rescue
• UFO — Unidentified Flying Object
• ESA — European Space Agency
• QC — Quality Control
• EOF — End Of File
• ELV — Expendable Launch Vehicle
• ISO — International Organization for Standardization
• ANSI — American National Standards Institute, Inc.
• AFAIK — As Far As I Know
• PDR — Preliminary Design Review
• BTW — By The Way
• HEAO — High Energy Astronomy Observatory
• AU — Astronomical Unit
• CD — Compact Disc
• MB — Megabyte
• CY — Calendar Year
• NFS — Network File System
• CV — Curriculum Vitae
• STS — Space Transportation System
• CCB — Configuration Control Board
• MOA — Memorandum Of Agreement
• A&AT — Astronomical and Astrophysical Transactions
• CBO — Congressional Budget Office
• ROI — Region of Interest
• EEO — Equal Employment Opportunity
• FYI — For Your Information
• APU — Auxiliary Power Unit
• ADS — Astrophysics Data System
• GATT — General Agreement on Tariffs and Trade (government)

• COB — close of business (End of duty day)
• SN — Space Network
• SIR — Shuttle Imaging Radar
• DOT — Department of Transport
• BAT — Burst Alert Telescope
• PT — Physical Therapy
• FAR — Flight Acceptance Review
• DDL — Data Definition Language
• MPH — Miles Per Hour
• A&ARV — Astronomy and Astrophysics Review
• R&D — Research & Development
• AHU — Air Handling Unit
• WAN — Wide Area Network
• SCSI — Small Computer System Interface
• IP — Internet Protocol
• RF — Radio Frequency
• OSO — Orbiting Solar Observatory
• ACE — Advanced Composition Explorer
• NSO — National Solar Observatory
• MOU — Memorandum of Understanding (an MOU between Food & Drug Administratin and a regulatory agency in another country allows mutual recognition of inspections)
• RFP — Request For Proposal
• COSPAR — Committee on Space Research (ICSU)
• FOV — Field Of View (satellite)
• E&PSL — Earth and Planetary Science Letters
• AAS — American Astronomical Society
• ISF — Industrial Space Facility
• USAF — United States Air Force
• AIAA — American Institute of Aeronautics and Astronautics, Inc.
• MRI — Magnetic Resonance Imaging
• FM — Flight Model
• CRS — Congressional Research Service
• NHLBI — National Heart, Lung, and Blood Institute
• DMSP — Defense Meteorological Satellite Program (U.S.)
• CKSM — checksum
• JAXA — Japan Aerospace Exploration Agency
• DME — Durable Medical Equipment
• IFOV — Instantaneous Field Of View
• OPD — Outpatient Department
• FOS — Faint Object Spectrograph
• OTA — Optical Telescope Assembly
• ACS — American College of Surgeons
• SIG — Special Interest Group
• BAE — British Aerospace Systems, LTD
• FD — Flight Day
• SRL — Space Radar Laboratory
• ADP — Automated Data Processing
• LTE — Local Thermodynamic Equilibrium
• DCC — Document Control Center
• GMT — Giant Magellan Telescope
• DEC — Digital Equipment Corporation

• ISRO — Indian Space Research Organisation
• I/O — Input/Output
• CAP — College of American Pathologists
• APS — American Physical Society
• BTU — British Thermal Unit
• NM — Nanometer
• EST — Eastern Standard Time
• ISO — Infrared Space Observatory
• KG — Kilogram
• SQA — Software Quality Assurance
• GR — General Relativity
• CM — Centimeter
• CM — Configuration Management
• PPM — parts per million
• HMO — Health Maintenance Organization
• SCA — Shuttle Carrier Aircraft
• GMP — Good Manufacturing Practice
• BMA — British Medical Association
• TV — Television
• LOR — Lunar Orbit Rendezvous
• SAS — Small Astronomy Satellite
• CHSAJ — Chinese Society of Astronautics Journal
• FTA — Fault Tree Analysis
• UCL — University College London
• M — Meter
• BHB — Black Hole Bang
• UHF — Ultra High Frequency (300-3000 MHz; 1m-10cm)
• AJ — Astronomical Journal
• MRB — Material Review Board
• MTBF — Mean Time Before Failure
• JAAVSO — Journal of the American Association of Variable Star Observers
• FFT — Fast Fourier Transform
• MSFC — Marshall Space Flight Center (Huntsville AL)
• ANS — Astronomical Netherlands Satellite
• ASTM — American Society for Testing and Materials (Philadelphia, Pennsylvania)
• LOI — Lunar Orbit Insertion
• SF — Science Fiction
• IRB — Institutional Review Board
• ASCII — American National Standard Code for Information Interchange
• CHJAA — Chinese Journal of Astronomy and Astrophysics
• CRO — Contract Research Organization
• SISEX — Shuttle Imaging Spectrometer Experiment
• ROM — Rough Order of Magnitude
• GPS — Global Positioning System (ex-NAVSTAR)
• SPR — Software Problem Report
• SRM — Solid Rocket Motor
• HV — High Voltage
• ADA&A — Advances in Astronomy and Astrophysics
• ADF — Astrophysics Data Facility
• BASD — Ball Aerospace Systems Division

• GEM — Giotto Extended Mission
• CRF — Case Report Form
• PR — Problem Report
• ATO — Abort To Orbit
• ISS — International Space Station
• AMU — Atomic Mass Unit
• ALS — Advanced Launch System
• ADIL — Astronomy Data Image Library
• LM — Lunar Module
• LOE — Level Of Effort
• LEO — Low Earth Orbit (satellite communications)
• CW — Clockwise
• DUNRE — Dunsink Observatory Reprints
• DC — Direct Current
• CMB — Cosmic Microwave Background
• NCCLS — National Committee for Clinical Laboratory Standards
• A&G — Astronomy and Geophysics
• SI — Scientific Investigation
• ZAND — Z ANDromedae
• CSTC — Consolidated Space Test Center
• NASP — National Aerospace Plane
• N/A — Not Applicable
• RFI — Radio Frequency Interference
• DAR — Defense Acquisition Regulation
• NSF — National Sanitation Foundation
• EU — European Union (1994; formerly referred to as the EEC or EC)
• DFRC — Dryden Flight Research Center
• DRS — Data Relay Satellite
• ST — Star Tracker
• R&QA — Reliability & Quality Assurance
• ESAJ — European Space Agency Journal
• CEN — Committee European de Normalisation
• NSA — National Security Agency
• VHF — Very High Frequency
• WAXD — Wide-Angle X-Ray Diffraction
• GO — General Observer
• SDD — Software Design Document
• PPO — Preferred provider organization
• B-V — Binary - Variable star
• A&A — Astronomy and Astrophysics
• SME — Solar Mesosphere Explorer
• CDM — Cold Dark Matter
• EDO — Extended Duration Orbiter
• TES — Thermal Emission Spectrometer
• ST — Space Telescope
• CCAFS — Cape Canaveral Air Force Station, an air force base in Florida where NASA launches satellites from.
• LOS — Line Of Sight
• JSC — Johnson Space Center (Houston, TX)
• MS — Millisecond
• AHA — American Hospital Association

• HOPPS — Hospital Outpatient Prospective Payment System
• COMSP — Commercial Space
• WP — Work Package
• RAM — random-access memory
• HCFA — Health Care Financing Administration
• MHZ — Megahertz (Megacycles Per Second)
• LEM — Lunar Excursion Module
• A/N — Alphanumeric
• HF — High Frequency
• TBD — To Be Determined
• AOCS — Attitude and Orbit Control System
• ☿ — Mercury
• CASJ — Canadian Aeronautics and Space Journal
• M&PS — Meteoritics and Planetary Science
• ECSS — European Cooperation for Space Standardization
• ALEXIS — Array of Low Energy X-ray Imaging Sensors
• BCD — Binary-Coded Decimal
• PDP — Postinsertion Deorbit Preparation
• MADOO — Madras Observatory Astronomical Observations
• D — Diameter
• MOSPO — Mobile Satellite Photometric Observatory
• NEC — National Electrical Code
• WG — Working Group
• JSAR — Journal of Space Astronomy Research
• P&SS — Planetary and Space Science
• DEC — Declination
• DFRF — Dryden Flight Research Facility
• BUBES — Bulletin of the University of Besancon Observatory
• PM — Pressurized Module
• ND — NASA Document
• ZEPLIN — ZonEd Proportional scintillation in LIquid Noble gases
• UT — University of Texas
• CHJSS — Chinese Journal of Space Science
• FU — Flight Unit
• K — Kilo-
• BH — Black Hole
• F&CRE — Flower and Cook Observatory Reprints
• SA — Solar Array
• COBE — Cosmic Background Explorer Satellite (NASA)
• AAMI — Association for the Advancement of Medical Instrumentation
• IUS — Inertial UPper Stage (was Interim UPper Stage)
• URL — Universal Resource Locator
• CHSST — Chinese Space Science Technology
• HSP — High Speed Photometer
• SVD — Singular Value Decomposition
• MCO — Mars Climate Orbiter
• MOL — Manned Orbiting Laboratory
• DC — Delta Clipper
• STR — Software Test Report
• ASTRA — Advanced Star Tracker

• JANSC — Journal of Astronautical Sciences
• NSP — NASA Support Plan
• P-E — Perkin-Elmer Corporation
• RTLS — Return To Launch Site
• AW&ST — Aviation Week & Space Technology
• BAICZ — Bulletin of the Astronomical Institutes of Czechoslovakia
• PIFOV — Planet In Field Of View
• CRT — Cathode Ray Tube (type of TV)
• ERBS — Earth Radiation Budget Satellite
• DD — Deputy Director
• RAS — Royal Astronomical Society
• FIFO — First In, First Out
• LCC — Launch Control Center (KSC)
• BBF — Bursty Bulk Flow
• MIS — Management Information System (OSHA)
• FITS — Flexible Image Transport System
• QA — Center for Quality Assurance in International Education
• BER — Bit-Error Rate
• DUNOP — Dunsink Observatory Publications
• JOP — Jupiter Orbiter Probe
• NIOSH — National Institute for Occupational Safety and Health
• APO — Apache Point Observatory
• EU — Expanded Universe
• TM — Telemetry
• LARC — Langley Research Center (NASA)
• ASC — Ambulatory Surgery Center
• FAQ — Frequently Asked Questions (sometimes Pronounced Fak)
• PDS — Planetary Data System
• AO — Adaptive Optics
• KSC — John F. Kennedy Space Center
• HD — Hilary Duff
• AA&AA — Astronomy and Astrophysics Abstracts Heidelberg
• CASJQ — Canadian Aeronautics and Space Journal Quarter
• NAI — No Action Indicated (Most Favorable Food & Drug Administration Post-inspection Classification)
• IPA — Individual Practice Association
• DSCS — U.S. Defense Satellite Communications System
• SSID1 — Soviet Space Insertion Diverter One
• CHIME — College of Healthcare Information Management Executives
• D — Director
• ABBOO — Abbadia Observatory Observations
• OIG — Office of Inspector General
• SPARTAN — Shuttle Pointed Autonomous Research Tool for Astronomy
• EUVE — Extreme Ultraviolet Explorer (NASA Satellite)
• CPI — Continuous Process Improvement
• CRAF — Comet Rendezvous/Asteroid Fly-by
• ESDAC — European Space Data Center
• JPL — Jet Propulsion Laboratory (California Institute of Technology) (NASA)
• SAAOC — South African Astronomical Observatory Circular
• SSME — Space Shuttle Main Engine
• P/SOS — Payload/Spacecraft Operations Simulator

• R/T — Real Time
• IR — Infrared
• ASRM — Advanced Solid Rocket Motor
• NAM — National Association of Manufacturers
• MOC — Mars Observer Camera
• DOD — United States Department of Defense
• ADC — Analog-Digital Converter
• USP — United States Pharmacopeia
• CAPS — Cassini Plasma Spectrometer
• FORTRAN — FORmula TRANslation (a computer language)
• E-ELT — European Extremely Large Telescope
• SSI — Space Studies Institute
• WISE — Wide-Field Infrared Survey Explorer
• LGA — Low Gain Antenna
• AT — Acceptance Test
• N — Nitrogen
• ARMOL — Armagh Observatory Leaflet
• AP — Array Processor
• FY — Fiscal Year
• NASM — National Air and Space Museum
• FTE — Full-Time Employee
• LRB — Liquid Rocket Booster
• ERS — Earth Resources Satellite
• IAU — International Astronomical Union
• DMA — direct memory access (computer term)
• BNSC — British National Space Centre
• ROSAT — Roentgen Satellite
• SDAC — Solar Data Analysis Center
• NORAD — North American Air Defense (Command)
• OS — Operating System
• SST — States Supersonic Transport
• OV — Orbital Vehicle
• AARP — American Association of Retired Persons
• AHRQ — Agency for Health, Research, and Quality
• GTO — Geostationary Transfer Orbit
• SIM — Simulator
• SUMS — Shuttle Upper Atmosphere Mass Spectrometer
• IEC — International Electrotechnical Commission
• DOE — United States Department of Energy (government)
• IDE — Investigational Device Exemption
• SDR — System Design Review
• NRC — National Response Center
• N — Newton
• ASCA — Advanced Satellite for Cosmology & Astrophysics
• PABEI — Progress in Astronomy
• JILA — Joint Institute for Laboratory Astrophysics
• AAAS — American Association for the Advancement of Science
• MMS — Module Management System
• CFR — Code of Federal Regulations
• ROSA — Romanian Space Agency

• SOW — Statement Of Work
• GSFC — Goddard Space Flight Center (Greenbelt, MD)
• TNM — The New Millenium
• RPM — Revolutions Per Minute, (Rotations Per Minute)
• ADFRF — Ames-Dryden Flight Research Facility
• NASDA — National Space Development Agency of Japan
• RTG — Radioisotope Thermoelectric Generator
• QJRAS — Quarterly Journal of the Royal Astronomical Society
• AFSD — Air Force Space Division
• SLAR — Side-Looking Airborne Radar
• FDA — Food Drug Administration
• VLF — Very Low Frequency
• MMU — Manned Maneuvering Unit
• RCS — Reaction Control System/Subsystem
• NOAA — National Oceanic and Atmospheric Administration (US)
• SARA — Society of Amateur Radio Astronomers
• MPL — Mars Polar Lander
• JD — Julian Date
• LPS — Launch Processing System
• NAS — United States National Academy of Sciences
• BPS — bits per second
• BASBR — Bulletin of the Astronomical Society of Brazil
• RSA — Russian Space Agency
• CTE — Charge Transfer Efficiency
• MTPE — Mission To Planet Earth
• NSI — NASA Science Internet
• APM — Attached Pressurized Module (a.k.a. Columbus)
• MHD — Magnetohydrodynamic
• LCROSS — Lunar CRater Observation and Sensing Satellite
• MEM — Meteoroid Exposure Module
• SIM — Space Interferometry Mission
• JALPO — Journal of the Association of Lunar & Planetary Observers
• CITECH — Center for Information on Technology in Healthcare
• SAO — Smithsonian Astrophysical Observatory
• LF — Luminosity Function
• ESTEC — European Space Research and Technology Centre
• LMSS — Lunar Mapping and Survey System
• ACMAN — Astronomical Contributions from the University of Manchester
• S/N — Serial Number
• ESRO — European Space Research Organisation
• PALLO — Publications of the Allegheny Observatory of the University of Pittsburgh
• WFF — Wallops Flight Facility
• UV — Ultraviolet (Light)
• FRR — Flight Readiness Review
• JASEG — Journal of the Astronomical Society of Egypt
• COSTAR — Corrective Optics Space Telescope Axial Replacement
• DAOAR — Dominion Astrophysical Observatory Annual Report
• MFPE — Mission from Planet Earth
• OMB — Office of Management and Budget (U.S.)
• AREG — Astronomical Register

• MGMA — Medical Group Management Association
• MMDA — Michigan Medical Device Association
• IUE — International Ultraviolet Explorer
• LED — law enforcement desk; light emitting diode
• AMPS — Atmospheric Magnetospheric Plasma System
• CIRCE — Confusion-limited Infrared Cosmology Explorer
• DSN — Deep Space Network - network of large antennas and communication facilities.
• MMT — Multiple Mirror Telescope
• HZ — cycles per second (hertz)
• AOA — Angle Of Attack
• ROI — Return on Investment
• DSS — Deep Space Station
• ITU — Infrared Telescope Unit
• OSCAR — Orbiting Satellite Carrying Amateur Radio
• APJ — Astrophysical Journal
• JEM — Japanese Experiment Module
• OPF — Orbiter Processing Facility
• CRC — Contrôle de Redondance Cyclique (French: Cyclic Redundancy Check)
• AACCS — Analytical Approach to Candidate Constellation Selection
• SNR — Signal-to-Noise Ratio
• RA — Right Ascension
• RADAR — RAdio Detection And Ranging
• DOMSAT — Domestic Communications Satellite System
• NIST — National Institute of Standards and Technology
• NCOS — National Commission on Space
• MOA — Microlensing Observations in Astrophysics
• POEM — Polar-Orbiting Earth Mission
• NASAR — NASA Reference Publication
• SSTO — Single-Stage-to-Orbit
• CM — Command Module
• MVM — Mariner Venus/Mercury
• ASTD — Advanced Space Technology Division
• UT — Universal Time
• JAPAS — Journal of Astrophysics and Astronomy Supplement
• Z — Zenith
• TARDIS — Time And Relative Dimensions In Space. Dr Who's company car, so to speak. I can confirm that it is 'Dimensions' not 'Dimension'. This begs the follow-up question as to whether the Dimensions are relative to each other or to time, or to both, or to somethi
• NASAS — NASA Special Publication
• DMERC — Durable Medical Equipment Regional Carrier
• PCM — Pulse-Code Modulation
• IMBH — Intermediate-Mass Black Hole
• ATDRS — Advanced Tracking and Data Relay Satellite
• ACRIM — Active Cavity Radiometer Irradiance Monitor (EOS)
• CDSF — Commercially Developed Space Facility
• GPC — General Purpose Computer
• OSS — Office of Space Sciences
• CCTV — Closed Circuit Television
• NRT — near real time
• O&M — Operation and Maintenance
• NASAL — NASA Circular Letter
• LOD — Length of Day

• FHST — fixed-head star tracker
• COTS — Commercial Off the Shelf Software
• PRAES — Progress in Aerospace Sciences
• SADE-1 — Solar Array Deploy Electronics-11
• ISAS — Institute of Space and Astronautical Sciences (Japan)
• ANEDI — Annals of the Royal Observatory, Edinburgh
• MSX — Midcourse Space Experiment
• PCA — Proportional Counter Array
• PADEU — Publications of the Astronomy Deparment of the Eotvos Lorand University
• ACICH — Astronomical Circular
• IEEE — Institute of Electrical and Electronic Engineers, Inc.
• ASPP — Atmospheric and Space Plasma Physics
• CHIPS — Cosmic Hot Interstellar Plasma Spectrometer
• UL — Underwriters Laboratory
• LSR — Local Standard of Rest
• PN — Planetary Nebula
• AFSCN — Air Force Space Command network
• ESRIN — European Space Research Institute
• APL — Applied Physics Laboratory (at Johns Hopkins)
• NASAC — NASA Conference Publication
• SFR — Star Formation Rate
• DUROO — Durham Observatory Observations
• STICA — Space Technology Industrial and Commercial Applications
• CFF — Columbus Free Flyer
• FS — Far Side
• PHASP — Physics and Astrophysics from Spacelab
• AMA — American Medical Association
• CDT — Connaissance Des Temps
• NASO — North American Space Operations
• MMA — Minnesota Medical Association
• GSC — Guide Star Catalog
• ATV — Automated Transfer Vehicle
• TANSTAAFL — There Ain't No Such Thing As A Free Lunch (coined By Author Robert A. Heinlein In His The Moon Is A Harsh Mistress)
• ABHI — Association of British Health-Care Industries
• OSSA — Office of Space Sciences and Applications
• HR — HUMAN RESOURCES
• CON — Certificate Of Need
• RVU — Relative Value Unit
• ESOC — European Space Operations Center
• FDR — Final Design Review
• XEUS — X-Ray Evolving Universe Spectroscopy Mission
• COWRO — Contributions from the Wroclaw Astronomical Observatory
• DSMB — Data Safety Monitoring Board
• PSI — Pounds Per Square Inch (Static Pressure)
• PCS — Pointing Control System
• IIRC — If I Recall Correctly
• PDR — Photo Dissociation Region
• VO — Virtual Observatory
• MDI — Michelson Doppler Imager
• SEOS — Synchronous Earth Observation Satellite

• DIST — Distance
• CQGRS — Classical and Quantum Gravity Supplement
• DYERE — Dyer Observatory Reprints
• KHZ — kilohertz (1000 cycles per second)
• UTC — Coordinated Universal Time
• CGRO — Compton Gamma-Ray Observatory
• AIRCO — Air et Cosmos
• HQ — Headquarters (HDQ Preferred)
• CNB — Cosmic Neutrino Background
• MHW — Ministry of Health and Welfare
• SNAP — Supernova / Acceleration Probe
• VATOP — Vatican Observatory Publications
• RAZEL — Range, Azimuth and Elevation
• WD — White Dwarf
• PPCAS — Publication of the Pomona College Astronomical Society
• SRB — Solid Rocket Boosters
• LLO — Low Lunar Orbit
• RQQ — Radio Quiet Quasar
• NBS — National Bureau of Standards (US)
• MADOB — Madras Observatory Observations
• GRC — Glenn Research Center
• ESTP — European Space Technology Platform
• SR — Special Relativity
• SLC — Space Launch Complex
• NEMA — National Electric Manufacturer's Association
• GCP — Good Clinical Practice
• AG — Astronomische Gesellschaft
• ND — Neutral Density
• MVI — Microgravity Vestibular Investigation
• SPP — Solar Physics Payload
• WET — Whole Earth Telescope
• MMI — Man-Machine Interface
• RALPH — Reduction and Acquisition of Lunar Pulse Heights
• SPART — Space Research and Technology
• ZAHB — Zero-Age Horizontal Branch
• PSC — Point Source Catalog
• M&R — Maintenance and Refurbishment
• ADSPR — Advances in Space Research
• RSN — Real Soon Now [which may be a long time coming]
• LANL — Los Alamos National Laboratory
• APJS — Astrophysical Journal Supplement Series
• CV — Cataclysmic Variable
• ESIS — ESA Space Information Systems
• TCPA — Time for Closest Point of Approach
• PM — Project Manager
• ASPRV — Astrophysics and Space Physics Reviews
• PHA — Physics And Astronomy
• ASTHE — Astronomical Herald
• WASOA — Washburn Observatory Astrophysics
• DBMS — Data Base Management System

• PPARC — Particle Physics and Astronomy Research Council
• SPMAR — Space Markets
• MSFN — Manned Space Flight Network
• COROT — Convection Rotation and Planetary Transits
• LASCO — Large Angle Spectrometric Coronograph
• KB — Kilobyte: One thousand and twenty-four bytes kbps kilo bit per second
• IFA — Institute for Astronomy
• PVO — Pioneer Venus Orbiter
• CEA — Center for EUV Astrophysics
• SM — Secondary Mirror
• LAN — Local Apparent Noon
• CASS — Center for Advanced Space Studies
• COCAM — Contributions from the Cambridge Observatory England
• AEXPR — Astronomy Express
• JASS — Journal of Astronomy and Space Sciences
• SPRBU — Space Research Bulgaria
• COKON — Commmunications of the Konkoly Observatory Hungary
• FIRSSE — Far Infrared Sky Survey Experiment
• SPVW — Spaceview
• AAT — Anglo Australian Telescope
• TEM — Transverse Electromagnetic
• ASI — Agenzia Spaziale Italiana
• ANMN — Antarctic Meteorite Newsletter
• MTC — Man-Tended Capability
• PCARS — Publication of COMU Astrophysics Research Center
• CL — Command Language
• ROTFL — Roll On The Floor Laughing
• OG — Original Gravity
• BAO — Beijing Astronomical Observatory
• PC — Planetary Camera
• ADEPS — Advances in Earth and Planetary Sciences
• LAT — Large Area Telescope
• AURA — Association of Universities for Research in Astronomy, Inc.
• PAH — Polycyclic Aromatic Hydrocarbon
• ICE — International Cometary Explorer
• DUDOR — Dudley Observatory Reports
• XRD — X-Ray Diffraction
• EAA — Encyclopedia of Astronomy and Astrophysics
• BPSK — binary phase shift keying
• AMS — American Meteor Society
• HIV — Hair Is Vanishing. Amusing alternative interpretation (thanks EP) contrasting with the seriousness of the more usual meaning of Human Immunodeficiency Virus.HIVIHusband Is Village Idiot. (ODSA) Classic nurses' shorthand.
• LH — Liquid Hydrogen
• RPM — Resale Price Maintenance. The UK Net Book Agreement, as was. Means by which retail prices are controlled by primary suppliers. (Alternatively, Revolutions Per Minute, as in engine speed and 78, 33 and 45 records. In years to come how many people will know
• MM — Memory Module
• NMI — Nautical Mile
• CQGRA — Classical and Quantum Gravity
• CRB — Change Review Board
• RAE — Radio Astronomy Explorer
• STO — Solar Terrestrial Observatory
• CMP — Competitive Medical Plan

• JBAS — Journal of the British Astronomical Society
• FTC — Federal Trade Commission (U.S.)
• DEACO — Dearborn Observatory Contributions
• PASAU — Proceedings of the Astronomical Society of Australia
• COLPL — Communications of the Lunar and Planetary Laboratory
• POMIC — Publications of Michigan Observatory
• OPM — Outer Planet Mission
• TLA — Three Letter Abbreviation
• GMT — Greenwich Mean Time (Zulu)
• ARC — Ames Research Center (NASA)
• TPF — Terrestrial Planet Finder
• CG — Center of Gravity (DXS)
• PROE — Publications of the Royal Observatory of Edinburgh
• SAR — synthetic aperture radar (satellite)
• CATS — Cheap Access to Space
• MRSR — Mars Rover Sample Return
• INS — Inertial Navigation System
• CASE — computer-automated software engineering
• PA — Popular Astronomy
• EC — European Community
• NIH — NATIONAL INSTITUTE OF HEALTH
• GPE — Gravitational Potential Energy
• BBT — Big Bang Theory
• BTOK — Bulletin of the Tokyo Astronomical Observatory
• LASS — large-amplitude space simulator
• RISC — Reduced Instruction Set Computer
• BLOB — Binary Large Object
• EOY — End-Of-Year
• GAO — Government Accountability Office [formerly the General Accounting Office]
• MIT — Massachusetts Institute of Technology (U.S.)
• AMPS — Atmosphere, Magnetosphere & Plasmas in Space
• SAPS — Sub Auroral Polarization Streams
• UW — University of Wisconsin
• TMT — Thirty-Meter Telescope
• ESABU — European Space Agency Bulletin
• HIRA — Health Industry Representatives Association
• CCD — Charge Coupled Device - a device for the movement of electrical charge.
• SSI — Solid-State Imager
• AAMC — American Association of Medical Colleges
• EBS — Electron Bombarded Silicon
• WAIS — Wide Area Information Server
• AXAF — Advanced X-Ray Astrophysics Facility
• ADCBU — Astronomical Data Center Bulletin
• UPS — Uninterruptible Power Supply
• JRASC — Journal of the Royal Astronomical Society of Canada
• APOD — Astronomy Picture of the Day
• NIST — National Institute of Standards & Technology (US)
• JAXA — Japan Aerospace Exploration System
• SSBUV — shuttle solar backscatter ultraviolet (radiometer)
• MEV — Mars Excursion Vehicle

• AR — Active Region
• SST — Spectroscopic Survey Telescope
• G — Gravity
• PRCO — Publications of the Riverview College Observatory
• OVS — Observation of Variable Stars
• PR — Public Relations
• DSSC — Deep Space Station Complex
• TV — Thermal Vacuum
• GIF — Graphic Interchange Format
• ONRAS — Occasional Notes of the Royal Astronomical Society
• ASHP — American Society of Hospital Pharmacists
• Z — Zulu (Greenwich mean time)
• OTV — Orbital Transfer Vehicle
• ORROE — Occasional Reports of the Royal Observatory, Edinburgh
• ORIG — Origin
• NASA — National Aeronautics and Space Administration (US)
• LEGRI — Low Energy Gamma-Ray Imager
• PHP — Planetary Horizontal Platform
• BKOAS — Bulletin of Korean Astronomical Society
• ISSRT — Israel Space Research and Technology Information Bulletin
• A&AS — Astronomy and Astrophysics Supplement Series
• NSTL — National Space Technology Laboratories (NASA)
• JBAA — Journal of the British Astronomical Association
• LR — Long Radius
• MECO — Magnetospheric Eternally Collapsing Object
• PHRMA — Pharmaceutical Research and Manufacturers of America (formerly PMA, Pharmaceutical Manufacturers Association)
• SOT — Solar Optical Telescope
• EIA — Extended Interaction Amplifier
• FRC — Flight Research Center
• ISO 14155 — Current Widely Accepted Standard
• ANDUD — Annals of the Dudley Observatory
• JDSO — Journal of Double Star Observations
• BAA — British Astronomical Association
• PPN — Proto-Planetary Nebula
• MELOO — Melbourne Observatory Observations
• ESOSP — European Southern Observatory Scientific Preprints
• E — Earth
• COMAP — Comments on Astrophysics
• RFNA — Red Fuming Nitric Acid
• CFA — Harvard-Smithsonian Center for Astrophysics, USA
• NERVA — Nuclear Engine for Rocket Vehicle Application
• VAB — Vertical Assembly Building
• NIZRE — Nizamiah Observatory Reprints
• RMS — root mean square (preferred over "RMS")
• ANDEA — Annales of the Dearborn Observatory
• ALPOJ — Association of Lunar and Planetary Observers Journal
• NSSDC — National Space Science Data Center (Greenbelt, MD)
• ARISTOTELES — Applications and Research Involving Space Technologies Observing the Earth's Field from Low Earth Orbiting Satellite
• TOMS — Total Ozone Mapping Spectrometer (satellite Instrument)
• CRPL — Cosmic Ray Physics Laboratory

• PROM — Programmable Read-Only Memory
• LM&SS — Lunar Mapping and Scientific Survey
• AREPS — Annual Review of Earth and Planetary Sciences
• AOA — Abort Once Around (shuttle Abort Plan)
• MNRAS — Monthly Notices of the Royal Astronomical Society
• MDD — Medical Device Directive
• GHZ — Gigahertz
• ANLOW — Annals of the Lowell Observatory
• CYSF — Cape York Space Facility
• BASI — Bulletin of the Astronomical Society of India
• COSRE — Cosmic Research
• ET — External Tank
• CHARA — Center for High Angular Resolution Astronomy
• ACRV — Assured Crew Return Vehicle
• ASTL — Astronomy Letters
• JAMA — Journal of the American Medical Association
• CU — Calibration Unit
• PHA — Potentially Hazardous Asteroid
• DIN — Deutsches Institut für Normung.
• ESPI — European Space Policy Institute
• KM — Kilometer (1,000 meters)
• MDS — Medium Deep Survey
• COVVO — Contributions of the Van Vleck Observatory
• TAG — Technical Advisory Group for Biological Control Agents of Weeds
• VAI — Voluntary Action Indicated (Food & Drug Administration postaudit inspection classification)
• GE — General Electric American Communications Inc.
• ANHAR — Annals of Harvard College Observatory
• COBRN — Contributions of the Public Observatory and Planetarium in Brno
• DG — Data Group
• PAMELA — Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics
• PLICO — Publications of Lick Observatory
• LBNL — Lawrence Berkeley National Laboratory (US)
• ESOAR — European Southern Observatory Annual Reports
• GOES — Geostationary Operational Environmental Satellite
• TAC — Telescope Allocation Committee
• JAHH — Journal of Astronomical History and Heritage
• IRAJ — Irish Astronomical Journal
• IGM — Intergalactic Medium
• M — Messier
• FAT — File Allocation Table
• IDTF — Independent Diagnostic Testing Facility
• VMS — Virtual Memory System
• ISBRV — International Space Business Review
• AAOPR — Anglo-Australian Observatory Epping Preprint
• ICCD — Intensified Charge-Coupled Device
• CEMEC — Celestial Mechanics
• TOY — Time of Year
• OSTA — Office of Space and Terrestrial Applications (US NASA; now OAST)
• AACC — American Association for Clinical Chemists
• DPS — Division for Planetary Sciences

• FAC — Facilities
• ANLUN — Annals of the Observatory of Lund
• APH — Astroparticle Physics
• EDT — Eastern Daylight Time
• ODF — Orbit Determination Facility
• COBOS — Contributions from the Bosscha Observervatory
• CDS — Coronal Diagnostic Spectrometer
• PASJ — Publications of the Astronomical Society of Japan
• MCD — Minimum Cost Design
• TTA — Time to Apogee
• NUSTAR — Nuclear Spectroscopic Telescope Array
• ADS — Astrophysics Data Service
• BSI — British Standards Institution
• MS — Master Schedule
• CEMDA — Celestial Mechanics and Dynamical Astronomy
• NDA — New Drug Application
• AREP — Astronomy Reports
• CIUO — Circular of the Union Observatory Johannesburg
• COASP — Comments on Astrophysics and Space Physics
• CHA&A — Chinese Astronomy and Astrophysics
• NEAR — Near-Earth Asteroid Rendezvous
• EBCI — Eclipsing Binaries Circulars
• AU — Alternate Universe
• EGG — Evaporating Gaseous Globule
• SEF — Space Environmental Facility
• SRAG — Space Radiation Analysis Group
• OAO — Orbital Astronomical Observatory
• USGS — United States Geological Survey (DOI)
• WMO — World Meteorological Organization (ICSU)
• OMS — orbital maneuvering system
• JCAP — Journal of Cosmology and Astro-Particle Physics
• UVS — Ultraviolet Spectrometer
• ASA — Astronomical Society Of The Atlantic
• MST — Mean Solar Time
• PHS — Public Health Service (U.S.)
• JASAC — Japan Astronomical Study Association Circulars
• SHA — Sidereal Hour Angle
• ADVAMED — Advanced Medical Technology Association
• NRL — Naval Research Laboratory
• ASSU — Annual Scientific Supplement to Urania
• JAPOA — Japan Amateur Photoelectric Observers Association
• OAP — Odessa Astronomical Publications
• PMUNO — Publications of the Munich Observatory
• CIBAA — Circular of the British Astronomical Association
• OARE — Orbital Acceleration Research Experiment
• ASC — Agence Spatiale Canadienne
• WHT — William Herschel Telescope
• MITI — Ministry of International Trade & Industry (Japan)
• SDI — Strategic Defense Initiative
• OWL — Overwhelmingly Large Telescope

• ISU — International Space University
• COARM — Contributions from the Armagh Observatory
• COSKA — Contributions of the Astronomical Observatory Skalnate Pleso
• FOC — Faint Object Camera
• AUJPA — Australian Journal of Physics Astrophysical Supplement
• LOX — Liquid Oxygen
• PLAST — Planetary Astronomy
• POS — Point of Service Plan
• RGB — Red Giant Branch
• MASER — microwave amplification by stimulated emission of radiation
• ASM — American Society for Microbiology
• ARKOD — Annual Report of the Kodaikanal Observatory
• SCP — Supernova Cosmology Project
• OBC — Onboard Computer
• PAAS — Publications of the American Astronomical Society
• PNAOJ — Publications of the National Astronomical Observatory of Japan
• SDO — Scattered Disk Object
• POMIN — Publications of the Astronomical Observatory University of Minnesota
• RSU — Rate Sensor Unit
• PASA — Publications of the Astronomical Society of Australia
• JAD — Journal of Astronomical Data
• JBRE — Jodrell Bank Reprints
• NEEDS — NASA end-to-end data system
• ANCAP — Annals of the Cape Observatory
• LHA — Local Hour Angle
• CAMRE — Cambridge Observatories Reprints
• SPIRE — Spectral Infrared Rocket Experiment
• MERIS — Medium Resolution Imaging Spectrometer
• MCC — Mission Control Center (JSC)
• E&S — Earth and Space
• PMANO — Publications of the Manila Observatory
• CDRH — Center for Devices and Radiological Health (Food & Drug Administration)
• BAAS — Bulletin of the American Astronomical Society
• DMF — Data Management Facility
• DSSN — Delta Scuti Star Newsletter
• BBXRT — Broadband XRay Telescope
• SPPOL — Space Policy
• IRAJS — Irish Astronomical Journal Supplement
• LAMOST — Large sky Area Multi-Object fiber Spectroscopic Telescope
• AE — Adverse Event
• CCR — Configuration Change Request
• SSRMS — Space Station Remote Manipulator System
• VLSI — Very-Large-Scale Integration
• HTH — Hope This Helps. Email abbreviation when replying to requests. Potentially counter-productive if the recipient doesn't understand what it means...
• OAI — Official Action Indicated (serious Food & Drug Administration post-inspection classification)
• EOL — End Of Line
• CME — Coronal Mass Ejection (usually Sun)
• EXA — Experimental Astronomy
• COLIC — Contributions of Lick Observatory
• LBLRR — LBL Research Review

• MMKMO — Memoirs Of The Kakioka Magnetic Observatory
• CODDO — Communications from the David Dunlap Observatory
• JBIS — Journal of the British Interplanetary Society
• COROE — Communications from the Royal Observatory Edinburgh
• FCPH — Fundamentals of Cosmic Physics
• OSHA — Occupational Safety and Health Act (1970)
• IQSY — International Quiet Sun Year
• HP — Hewlett Packard's
• STACC — Standard Telemetry And Communications Component
• BPI — bits per inch
• JIMO — Journal of the International Meteor Organization
• ETLA — Extended Three Letter Acronym
• GLOMR — Global Low-Orbiting Message Relay
• DDCMP — Digital Data Communications Message Protocol
• K — Kilogram
• VBR — Variable Bit Rate (ATM)
• LBT — Large Binocular Telescope
• ARA&A — Annual Review of Astronomy and Astrophysics
• IDT — Investigation Definition Team
• XRT — X-Ray Telescope
• COSSE — Cosmic Search Summer
• SPIRIT — Spatial Infrared Telescope
• VTVL — Vertical Takeoff Vertical Landing
• ARCHS — Archaeoastronomy Supplement
• MECO — Main Engine Cutoff
• MELAR — Melbourne Observatory Annual Report
• JAPA — Journal of Astrophysics and Astronomy
• VSOP — VLBI Space Observatory Program
• AMIA — The American Medical Informatics Association
• CNSA — China National Space Administration
• COPRE — Copenhagen University Observatory Reprints
• SSPF — Space Station Processing Facility
• ELT — Extremely Large Telescope
• BCRAO — Bulletin Crimean Astrophysical Observatory
• BOD — Board of Directors (Budget)
• MWOAR — Mount Wilson Observatory Annual Report
• EEXSC — Earth and Extraterrestrial Sciences
• PLANEMO — Planetary Mass Object
• SG — Shattered Galaxy (game)
• JHAS — Journal for the History of Astronomy Supplement
• PMC — Permanently Manned Capability (of Space Station)
• CDC — Centers for Disease Control
• PERCO — Perkins Observatory Contributions
• NAFTA — North American Free Trade Agreement
• PGLO — Publications of the Goethe Link Observatory
• JKAS — Journal of Korean Astronomical Society
• SAC — Solar Array Carrier
• F — Degrees Fahrenheit
• LAC — Lockheed Aircraft Corporation
• BHB — Blue Horizontal Branch

• WR — Western Range
• ASQ — Alpha System Qualification
• ROE — Royal Observatory, Edinburgh
• CIRRIS — Cryogenic Infrared Radiance Instrument for Shuttle
• MPS — Mission Planning System
• CBR — Cosmic Background Radiation
• PA — Position Angle
• ANOLL — Annals of the Private Observatory of Lucien Libert
• AZ — Azimuth
• JASV — Journal of the Astronomical Society of Victoria Melbourne
• BIS — British Interplanetary Society
• ESOSR — European Southern Observatory Scientific Report
• OEJV — Open European Journal on Variable Stars
• WGPSN — Working Group for Planetary System Nomenclature
• MASSMEDIC — Massachusetts Medical Device Industry Council
• LAD-C — Large Area Debris Collector
• LRO — Lunar Reconnaissance Orbiter
• CBER — Center for Biologics Evaluation and Research
• LICOB — Lick Observatory Bulletin
• DEM — Differential Emission Measure
• JRASN — Journal of the Royal Astronomical Society of New Zealand
• SO — Space Operations
• LRSP — Living Reviews in Solar Physics
• JHA — Journal for the History of Astronomy
• CPAF — Cost Plus Award Fee (Type of Contract)
• PDDO — Publications of the David Dunlap Observatory
• EPS — Encapsulated Postscript
• COPER — Contributions of Perkins Observatory
• K — Kelvin (absolute temperature scale)
• SPICE — Survey Probe Infrared Celestial Experiment
• SANS — Stellar Autonomous Navigation System
• MAFI — Medical Alert Foundation International
• EAPSNET — East-Asian Planet Search Network
• SAC — Saguaro Astronomy Club
• ISY — International Space Year (1992)
• IRSA — Infrared Science Archive
• AGILE — Astro-rivelatore Gamma a Immagini Leggero
• PCINO — Publications of the Cincinnati Observatory
• IRAS — Infrared Astronomy Satellite
• GG — Gravity Gradient
• HHS — Health and Human Services Department
• BD — Bonner Durchmusterung
• JBAN — Jodrell Bank Annals
• JHIT — Joint Healthcare Information Technology Alliance
• DCR — Document Change Request
• HOTOL — Horizontal Takeoff and Landing Launcher
• RSO — Resident Space Object
• VDU — Video Display Unit
• ASSA — Astronomical Society of South Africa
• S/W — Software

• ANTOK — Annals of the Tokyo Astronomical Observatory
• TCE — Thermal Control Electronics
• STOMS — Space Telescope Observatory Management System
• SEM — space environment monitoring
• SRD — Software Requirements Document
• MPO — Mercury Planetary Orbiter
• AVSOM — American Association of Variable Stars Observers Monographs
• OHP — Observatoire de Haute-Provence
• IUENN — IUE NASA Newsletter
• IUEEN — IUE ESA Newsletter
• APHA — American Pharmaceutical Association
• ODB — Operations Data Base
• AASPP — Astrononomy and Astrophysics Series
• PLR — Planetary Report
• UDL — Unique Data Log
• LGM — Little Green Men
• NEWAR — New Astronomy Review
• AAONW — Anglo-Australian Observatory Epping Newsletter
• NCI — National Cancer Institute, USA
• CEO — Corporate Europe Observatory
• HRI — High Resolution Imager
• PDREO — Publications of the Dresden Observatory
• ASMT — American Society for Medical Technology
• CRARE — Cracow Observatory Reprints
• ATC — Absolute Time Command
• NASPY — North American Society of Electro Physiology and Pacing
• CD — Cordoba Durchmusterung
• NOAO — National Optical Astronomy Observatories (Tucson, AZ)
• CSC — Collection of Small Companies. Alternative interpretation (apparently used by staff) of the CSC company name, which properly stands for Computer Sciences Corporation. The 'Collection of Small Companies' version reflects CSC's operatianal structure, which
• ROUS — Rodents Of Unusual Size
• TMC — Taurus Molecular Cloud
• MIP — Moon Impact Probe
• DWE — Doppler Wind Experiment
• TIFF — Tag Image File Format
• TPS — Thermal Protection System
• S/N — Signal-to-Noise ratio
• CEAB — Central European Astrophysical Bulletin
• DDORE — David Dunlap Observatory Richmond Hill Reprints
• IPAC — Infrared Processing and Analysis Center
• EUV — Extreme Ultraviolet Vertical
• SI — Science Instrument
• EVA — Extra-Vehicular Activity
• SAS — Space Adaptation Syndrome
• SO/SI — space operations and scientific investigation
• ISEE — International Sun-Earth Explorer
• PSPRO — Publications of the Sproul Observatory
• IMO — International Meteor Organization
• SDIO — Strategic Defense Initiative Organization
• ANSAO — Annals of the Astrophysical Observatory of the Smithsonian Institution
• DOY — Day of Year

• AC — Astrographic Catalogue
• PST — Personal Solar Telescope
• SIDC — Sunspot Index Data Center
• JAC — Joint Astronomy Centre
• OMC — Orion Molecular Cloud
• ATM — Apollo Telescope Mount (on Skylab)
• IDL — Interactive Data Language
• POVRO — Publications of the Owens Valley Observatory
• SL — Comet Shoemaker-Levy
• WR — Wolf-Rayet Star
• PMT — Photo Multiplier Tube
• PBEIO — Publications of the Beijing Astronomical Observatory
• SIRTF — Shuttle InfraRed Telescope Facility
• GOES — Geostationary Orbiting Environmental Satellite
• DOH — Department of Health (various countries)
• STATS — star tracker alignment test set
• CMA — Chemical Manufacturers Association
• AGB — Asymptotic Giant Branch
• EGRET — Energetic Gamma Ray Explorer Telescope
• VMS — Vertical Motion Simulator
• SSP — Subsolar Point
• APJL — Astrophysical Journal Letters
• RA — Regulatory Affairs
• USRA — Universities Space Research Association
• POHEL — Publications of the Astronomical Observatory Helsinki
• CPI — characters per inch
• NEP — North Ecliptic Pole
• HIAA — Health Insurance Association of America
• APPLE — Ariane Passenger Payload Experiment
• HZ — Habitable Zone
• OASH — Office of the Assistant Secretary for Health
• AVSOQ — American Association of Variable Stars Observers Quarterly Reports
• S/C — Spacecraft
• USPHS — United States Public Health Service
• HCIS — Health Care Information System
• MV — Apparent Visual Magnitude
• GHA — Greenwich Hour Angle
• BANS — Bulletin of the Astronomical Institutes of the Netherlands, Supplement Series
• MMAAR — Maria Mitchell Association Annual Report
• PAM — Payload Assist Module
• MITTS — Mobile Igor Tracking Telescope System
• ADSAC — Advanced Series in Astrophysics and Cosmology
• NCAR — National Center for Atmospheric Research (US)
• PVVO — Publications of the Van Vleck Observatory
• DSP — Defense Support Program
• CEV — Crew Exploration Vehicle
• NEODYS — Near Earth Objects Dynamic Site
• CTB — Cargo Transfer Bag
• NED — NASA/IPAC Extragalactic Database
• NRAOR — National Radio Astronomy Observatory Reprints

• TEI — The Education Initiative
• SMS — Science Mission Specification
• ADU — Astronomical Distance Unit
• USNO — United States Naval Observatory
• CADC — Canadian Astronomy Data Centre
• ANSHO — Shanghai Observatory Annals
• TEA — Torque Equilibrium Attitude
• DES — Deep Ecliptic Survey
• SID — Sudden Ionospheric Disturbance
• HIS — Health Information Systems
• APINV — Astrophysical Investigations
• ATEL — Astronomer's Telegram
• UGC — Uppsala General Catalog
• APL&C — Astrophysical Letters Communications
• ASAIO — American Society for Artificial Internal Organs
• SST — Space Surveillance and Tracking
• PRAST — Practical Astronomy
• RCS — Radar Cross Section
• IPC — Interprocess Communication
• NABR — National Association for Biomedical Research
• KODOB — Kodaikanal Observatory Bulletins
• MOS — Metal Oxide Semiconductor (FET Devices)
• FAHS — Federation of American Health Systems
• PI — Principle Investigator
• ADASS — Astronomical Data Analysis Software and Systems
• CHPA — Consumer Healthcare Products Association
• CLMA — Clinical Laboratory Management Association
• LLAGN — Low-Luminosity Active Galactic Nucleus
• SPOT — Satellite Pour l'Observation de la Terre (France)
• NCC — Network Control Center (GSFC)
• DOAMS — distant-object attitude-measuring system
• SMART — Small Missions for Advanced Research in Technology
• SSS — Spinning Sun Sensor
• IU — Interface Unit
• SR — Spectral Recording
• DSMA — Division of Small Manufacturers Assistance
• RSNA — The Radiological Society of North America, Inc.
• SIMCAT — simulate observations using space catalog
• PLAWO — Publications of Laws Observatory
• EU — Extended Universe
• NCSC — National Council of Senior Citizens
• IES — Institute of Environmental Sciences
• ESAST — European Space Agency Scientific Technical Review
• TDRSS — Tracking and Data Relay Satellite System
• CAPMI — Royal Observatory Cape Mimeogram
• BIO — Biotechnology Industry Organization
• ASCRS — American Society of Cataract and Refractive Surgery's
• BAVSO — Bulletin of the American Association of Variable Stars Observers
• GHTF — Global Harmonization Task Force
• CIT — California Institute of Technology (Pasadena, CA)

• AGU — American Geophysical Union
• JCAHO — Joint Committee on the Accreditation of Healthcare Organizations
• AVSOA — American Association of Variable Stars Observers Abstracts
• SEB — Systems Engineering Branch
• RTC — Real-Time Command
• LAIRT — Large-Aperture Infrared Telescope
• AEDRV — Astronomy Education Review
• MJD — Modified Julian Date
• HFMA — Healthcare Financial Management Association
• HRMS — High Resolution Microwave Survey (SETI, Project Phoenix)
• CMS — Correctional Medical Services
• MMO — Mercury Magnetospheric Orbiter
• LPV — Long Period Variable
• ONR — Office of Naval Research (U.S.)
• MOTIF — Maui Optical Tracking and Identification Facility
• APL — Astrophysical Letters
• IPEM — Institute of Physics and Engineering in Medicine
• PAIB — Publications of the Astronomy Institute of Bonn
• CPD — Cape Photographic Durchmusterung
• SETI — Search for Extraterrestrial Intelligence
• PPMTO — Publications of the Purple Mountain Observatory
• STAR — Space Telescope Axial Replacement
• AST — Astrometry Science Team
• SUNY — State Universityrsity of New York
• ECA — Earth Crossing Asteroid
• PSK — Phase Shift Key
• ATM — Amateur Telescope Maker
• KP — Kitt Peak
• CAS — Cambridge Astrophysics Series
• HIBCC — Health Industry Business Communications Council
• ISR — Instrument Science Report
• ETR — Eastern Test Range (ESME Preferred)
• ITF — Intensity Transfer Function
• CENELEC — European Committee for Electromechanical Standardisation
• EFCS — Earth-fixed coordinate system
• ICD-9-CM — International Classification of Diseases, 9th Edition
• ESO — European Southern Observatory
• ISTS — Institute for Space and Terrestrial Science
• CBI — Confederation of British Industries
• VAP — Verification and Acceptance Program
• TAC — Time Allocation Committee
• SPO — Sacramento Peak Observatory
• VPF — Vertical Processing Facility
• DSO — Deep Sky Object
• CSM — Command and Service Module
• AUASS — Arab Union for Astronomy and Space Sciences
• TMP — Technical Management Plan
• LHEA — Laboratory for High Energy Astrophysics
• ASH — American Society of Hematology's
• KODRE — Kodaikanal Observatory Reprints

• ANLL — Annals of the Observatory of Lucien Libert
• RM — Retrieval Mode
• PFAO — Publications of the Flower Astronomical Observatory
• EGRET — Energetic Gamma Ray Experiment Telescope
• COWAT — Contributions of the University of Waterloo Observatory
• NAHIT — National Alliance for Health Information Technology
• MTPPI — Medical Technology and Practice Patterns Institute
• MVEMJSUNP — Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto
• SZA — Solar Zenith Angle
• JAAME — Japanese Association for the Advancement of Medical Equipment
• DH — Data Handling
• PBRN — Publications of the Astronomical Institute of the University of Borneo
• ECS — Environmental Control System (Subsystem)
• APT — Automatic Photometric Telescope
• COOXF — Communications from the University Observatory Oxford
• LAMMR — large-antenna multichannel microwave radiometer
• HIB — Health Insurance Bureau (Japan)
• IOLM — International Organization of Legal Metrology
• PAB — Publications of The Astrophysics Branch Ottawa
• CSVS — Catalogue of Suspected Variable Stars
• MDDI — Medical Device and Diagnostics Industry
• CSG — Council of State Governments
• PSLV — Polar Satellite Launch Vehicle (Indian Space Research Organization; India)
• DCT — Discrete Cosine Transformer
• MS — Mission Schedule
• CRS — Cambridge Reference Sequence
• POSS — Palomar Observatory Sky Survey
• SST — Spitzer Space Telescope
• LAPSS — Large-Area Pulse Solar Simulator
• VCS — Vernier Control System
• DIN — Deutsches Institut fur Normung
• PISTO — Publications of the Istanbul Observatory
• HIMSS — Healthcare Information and Management Systems Society
• MOND — Modified Newtonian Dynamics
• ISN — International Supernovae Network
• MO — Mars Observer
• ESOB — European Southern Observatory Bulletin
• TT — Terrestrial Time
• MEDEC — Medical Devices Canada
• IAPM — International Association of Medical Prosthesis Manufacturers
• CCR — Cost-Charge Ratio
• UPPAN — Uppsala Astronomical Observatory Annals
• NLN — National League for Nursing
• ATLAS — ACTIVITIES Atmospheric Laboratory for Applications and Science
• DSNPR — Deep Space Network Progress Report
• ASTRA — Astrophysics and Space Sciences Transactions
• AP&SS — Astrophysics and Space Science
• UNOOSA — United Nations Office for Outer Space Affairs
• IDT — Instrument Development Team
• ID — IDentifier

• MSSS — Maui Space Surveillance Site
• OPAG — Outer Planets Assessment Group
• JCCT — Joint Commission on Commerce and Trade (US-China)
• CPMF — cost plus management fee
• KPNO — Kitt Peak National Observatory (Tucson, AZ)
• IRBS — Infrared Background Sensor
• PASPS — Publications of the Astronomical Society of the Pacific Supplement
• FTL — Faster Than Light
• MEDGV — Germany's Medical Equipment Safety Law
• CEC — Commission of the European Communities ;
• FWHM — Full Width at Half Maximum
• APC — Ambulatory Payment Class
• AMANDA — Antarctic Muon And Neutrino Detector Array
• RAL — Radio Astronomy Laboratory
• SERC — Science and Engineering Research Council
• FDLI — Food and Drug Law Institute
• ISTAHC — International Society of Technology Assessment in Health Care
• WIMP — Weakly Interacting Massive Particle
• ALMA — Atacama Large Millimeter Array
• AFGWC — Air Force Global Weather Central (U.S.)
• CIT — Circumstellar Imaging Telescope
• CCAS — Cape Canaveral Air Station
• CSA — Canadian Standards Association (like UL)
• LLC — Limited Liability Partnership
• PAICZ — Publications of the Astronomical Institute of the Czechoslovak Academy of Sciences
• BALTA — Baltic Astronomy
• LST — Large Space Telescope
• COLON — Communications of the University of London Observatory
• MEPAG — Mars Exploration Program Analysis Group
• PDA — Parenteral Drug Association
• LAWOB — Laws Observatory Bulletin
• EUDRA — European Drug Regulatory Authorities Network
• CIAO — Chandra Interactive Analysis of Observations
• CFC — Chloroflourocarbon
• HTML — Hyptertext Markup Language
• ANS — Astro News Service
• MMH — Monomethyl Hydrazine
• ADEC — Astrophysics Data Centers Executive Council
• D — Directive
• ORA — FDA's Office of Regulatory Affairs
• NIR — Near Infrared
• GLP — Good Laboratory Practice
• MMASI — Memoirs of the Astronomical Society of India
• EOS — Earth Observing System (U.S.)
• EPIC — Earth Polychromatic Imaging Camera
• PMCCO — Publications of the Leander McCormick Observatory
• DEED — Minnesota Department of Employment and Economic Development
• RTS — Relative Time Sequence
• DAO — Dominion Astrophysical Observatory (Victoria, BC, Canada)
• SAT — Synthetic Aperture Telescope

• VHT — Very High Temperature
• SDSS — Sloan Digital Sky Survey
• MOPH — Ministry of Public Health
• PKIRO — Publications of the Kirkwood Observatory of Indiana University
• INTEGRAL — International Gamma-Ray Astrophysics Laboratory
• ANCGH — Annals of Royal Observatory, Cape of Good Hope
• MIAA — Medical Industry Association of Australia
• PPQA — Pre-Product Quality Assurance
• CAROB — Carter Observatory Wellington New Zealand Astronomical Bulletins
• TIROS — Television InfraRed Observation Satellite (POES)
• LEND — Lunar Exploration Neutron Detector
• FIPS — Fast Imaging Plasma Spectrometer
• LPL — Lunar and Planetary Laboratory
• PDAO — Publications of the Dominion Astrophysical Observatory
• MAGIC — Major Atmospheric Gamma-ray Imaging Cherenkov Telescope
• SNR — Super Nova Remnant
• QSO — Quasar|Quasi-Stellar Object
• SEDS — Students for the Exploration and Development of Space
• M&P — Materials and Processes
• SBNC — Small Bodies Names Committee
• PEPI — Physics of the Earth and Planetary Interiors
• COPRI — Contributions from the Princeton University Observatory
• IPNPR — Interplanetary Network Progress Report
• FSK — Frequency Shift Keying
• COAST — Communications in Asteroseismology
• AVSOR — American Association of Variable Stars Observers Reports
• CARA — Center for Astrophysical Research in Antarctica
• ISM — Interstellar Medium
• ARBEI — Astrophysics Reports Publications of the Beijing Astronomical Observatory
• PDUFA — Prescription Drug User Fee Act (1992, U.S.)
• LNSP — Lecture Notes and Supplements in Physics
• VDS — Vereinigung der Sternfreunde
• BCG — Blue Compact Galaxy
• CORAD — Communications from the Radcliffe Observatory Pretoria South Africa
• ANBOS — Annals of the Bosscha Observatory Lembang
• AMR — Antarctic Meteorite Research
• APSSS — Astrophysics and Space Science Supplement
• TMA — Tycho Magnetic Anomaly
• FDAMA — FDA Modernization Act of 1997
• MPC — Minor Planets Circular
• PROPAC — Prospective Payment Assessment Commission
• MFR — Manipulator Foot Restraint
• PCOOO — Publications of the Cook Observatory
• NAOJ — National Astronomical Observatory of Japan
• HST — Hubble Space Telescope
• PAN-STARRS — Panoramic Survey Telescope and Rapid Response System
• NEA — Noise Equivalent Angle
• FIRST — Frontiers in Research: Space and Time
• OPS — Operations Division
• CRISTA — Cryogenic Infrared Spectrometer Telescope For Atmosphere

• ALAMO — Automated Lunar and Meteor Observatory
• PASK — Publications of the Academy of Science Kasakstan
• TOPS — Toward Other Planetary Systems
• MMBAA — Memoirs of the British Astronomical Association
• PKAS — Publication of the Korean Astronomical Society
• EPD — Energetic Particles Detector
• HIDA — Health Industry Distributors Association
• CCA — Cambridge Contemporary Astrophysics
• ECRI — Emergency Care Research Institute
• AGPS — Assisted Global Positioning System
• ARC — Astrophysical Research Consortium
• CST — Constant-Separation Traversing
• TUV — Technische Uberwachungs-Vereine
• CARRE — Carter Observatory Wellington New Zealand Reprints
• VTHL — Vertical Takeoff Horizontal Landing
• EBTC — Edison BioTechnology Center
• SF — Square Foot
• LAMP — Lyman-Alpha Mapping Project
• RAPS — Regulatory Affairs Professional Society
• CHI — California Healthcare Institute
• PPRC — Physician Payment Review Commission
• BATSE — Burst and Transient Source Experiment
• MDRS — Mars Desert Research Station
• LS/ST — Light Shield/Star Tracker
• BDB — Big Dumb Booster
• NG — Newsgroup
• POL — Physician's Office Laboratory
• LSF — Line Spread Function
• SPAC — State Pharmaceutical Administration of China
• MOSS — Market-Oriented Sector Selective
• HSQB — Health Standard and Quality Bureau
• IRA — Infrared Astronomy
• AAVSO — American Association of Variable Star Observers
• AIPS — Astronomical Image Processing System
• PRO — Professional Review Organization
• ADC — Astronomical Data Center
• PAB — Pharmaceutical Affairs Bureau (Japan)
• OHTA — Office of Health Technology Assessment
• PDO — Publications of the Dominion Observatory Ottawa
• FIR — Far Infrared
• CSM — Circumstellar Material
• AIMBE — American Insitute for Medical and Biological Engineering
• CFIT — Controlled Flight into Terrain
• EMDM — European Medical Device Manufacturer
• GIO — graphics input/output
• AO — announcement of opportunity
• PMA — Premarket Application
• IMDA — Independent Medical Distributors Association
• PGOOO — Publications of the Goodsell Observatory
• RNAOJ — Report of the National Astronomical Observatory of Japan

• NIGMS — National Institute Of General Medical Sciences (NIH)
• EVN — European VLBI Network
• NEOIC — Near Earth Object Information Center
• EU — Engineering Unit
• MEERE — Kenneth Mees Observatory Reprints
• SVPCS — Springer Verlag Springer Series on Physics Chemistry Space
• MEI — Medical Economic Index
• RAD — Radiant
• QSR — Quality System Regulation
• TBBT — The Big Bang Theory
• MSSSO — Mount Stromlo and Siding Spring Observatories
• PDR — Physician’s Desk Reference
• HRS — High Resolution Spectrograph
• FK4 — Fundamental Katalog 4
• OBAFGKM — Oh, Be A Fine Girl, Kiss Me
• TR — Tape Recorder
• UARS — Upper Atmosphere Research Satellite (NASA)
• TAG — Two-Axis Gimbal
• CSO — Caltech Submillimeter Observatory
• TIMED — Thermosphere Ionosphere Mesosphere Energetics and Dynamics
• SARA — Satellite pour Astronomie Radio Amateur
• ALPO — Association of Lunar and Planetary Observers
• ASTQ — Astronomy Quarterly
• MNSSA — Monthly Notes of the Astronomical Society of South Africa
• HEDIS — Healthplan Employee Data and Information
• ACE — Actuator Control Electronics
• MTSRE — Mount Stromlo Observatory Reprints
• AMDM — Association of Medical Diagnostics Manufacturers
• PISCO — Parallel Imager for Southern Cosmological Observations
• GHRS — Goddard High Resolution Spectrograph
• PT — Pass-Through
• OAF — Optical Alignment Facility
• INDA — Investigational New Drug Application
• NRO — U.S. National Reconnaissance Office
• SUSIM — Solar Ultraviolet Spectral Irradiance Monitor
• MMRAS — Memoirs of the Royal Astronomical Society
• HRSA — U.S. Health Resources and Services Administration
• PCS — Physics and Chemistry in Space
• BEV — Billion Electron Volts
• QBO — Quasi-biennial Oscillation (atm.)
• CSBN — Committee for Small-Body Nomenclature
• NHIB — National Health Insurance Bureau (Taiwan)
• RGO — Royal Greenwich Observatory
• RAA — Relative Azimuth Angle
• AOR — Astronomical Observation Request
• JVO — Japanese Virtual Observatory
• CTO — Color Temperature Orange
• ECCLS — European Committee on Clinical Laboratory Standards
• MEDSUN — Medical Device Surveillance Network
• HDIF — Health Care Data Interchange Format

• COCIR — Coordination Committee of the Radiological and Electromedical Industries
• FSM — First Servicing Mission
• DNA — Digital Network Architecture
• UADE — Unanticipated Adverse Device Effects
• OXFOO — Oxford University Observatory Observations
• HRA — High Resolution Apodizer
• CCD — Color-Color Diagram
• AGN — Active Galaxy Nucleus
• MTSOM — Mount Stromlo Observatory Mimeographs
• HPB — Health Protection Board (Canada)
• CCDM — Catalog of Components of Double and Multiple Stars
• ISTEC — International Small Telescope Cooperative
• PYERO — Publications of the Yerkes Observatory
• QSIT — Quality System Inspection Technique
• Z — Redshift Factor
• STSCI — Space Telescope Science Institute
• USNOC — United States Naval Observatory Circulars
• RECONS — Research Consortium on Nearby Stars
• PDAA — Publications of the Department of Astronomy, Austin, Texas
• VLBI — Very Long Baseline Interferometry
• RTK — Right-To-Know
• JFMDA — Japan Federation of Medical Device Associations
• MOTIE — Ministry of Trade, Industry, and Energy (Korea)
• TIE — Telescopes in Education
• WEBT — Whole Earth Blazar Telescope
• FAME — Full-sky Astrometric Mapping Explorer
• OSSE — Oriented Scintillation Spectrometer Experiment
• HCPCS — Health Care Common Procedure Coding System
• VEEGA — Venus-Earth-Earth Gravity Assist
• RASC — Royal Astronomical Society of Canada
• KCAO — Kumamoto Civil Astronomical Observatory
• IAO — International Astronomy Olympiad
• JET-X — Joint European Telescope for X-ray astronomy
• PDA — Photon Detector Assembly
• RLQ — Radio Loud Quasar
• NMDC — National Medical Device Coalition
• IDA — International Dark-Sky Association, Inc.
• IOTA — International Occultation Timing Association
• GDS — Great Dark Spot
• EDMA — European Diagnostics Manufacturer's Association
• NAG — Numerical Algorithms Group Inc.
• UCLA — Harbor-University of California Los Angeles
• NAMES — National Association of Medical Equipment Services
• MDC — Major Diagnostics Category
• OOTU — Origin Of The Universe
• FQR — Flight Qualification Review
• PNLF — Planetary Nebula Luminosity Function (astronomy)
• VVORE — Van Vleck Observatory Reprints
• HUT — Hopkins Ultraviolet Telescope
• RC — Reference Catalogue

• SMDA — Safe Medical Devices Act (1990)
• ASCP — American Society for Clinical Pharmacology and Therapeutics
• NSL — Northrop Space Laboratory
• PEP — Proposal Entry Processor
• STEREO — Solar Terrestrial Relations Observatory
• ADIS — Astrophysics Data and Information Services
• MEDMARC — Medical Device Material Assurance and Reinsurance Company, Ltd.
• UHMW — Ultra High Molecular Weight
• LOWOB — Lowell Observatory Bulletin
• NSSCC — NORAD Space Surveillance Computation Center
• SMA — Secondary Mirror Assembly
• AST — Apparent Solar Time
• ICH — International Conference of Harmonization
• MICRE — University of Michigan Observatory Reprints
• MPEC — Minor Planet Electronic Circular
• MPI — Minnesota Project Innovation
• CD-ROM — compact disc-read only memory
• M&P — Moon and Planets
• CPFF — Cost Plus Fixed-Fee
• MIL-STD — Military Standard
• DRG — Diagnosis-Related Groups
• IDT — Image Dissector Tube
• VLA — Very Large Array
• LPO — La Palma Observatory
• SOLSTICE — Solar Stellar Irradiance Comparison Experiment
• EFPIA — European Federation of Pharmaceutical Industries and Associations
• SAAO — South African Astronomical Observatory
• MPBU — Minor Planet Bulletin
• DN — Digital Number
• MNBIO — Minnesota Biotechnology
• SOHO — SOlar and Heliospheric Observatory
• BWI — Baltimore-Washington International Airport, between Baltimore, Maryland and Washington, DC, United States
• PF&CO — Publications of the Flower and Cook Astronomical Observatory
• DISR — Descent Imager/Spectral Radiometer
• PBPK — Physiologically-Based Pharmacokinetic
• MACHO — Massive Astronomical Compact Halo Object
• CDMH — Cold Dark Matter Haloes
• PACS — Physics and Astronomy Classification Schemex
• IPS — Inches Per Second
• NSC — Navigational Star Catalog
• HAACP — Hazard Analysis Critical Control Points Program
• SIRTF — Space Infrared Telescope Facility
• SGR — Soft Gamma Repeater
• IOA — Institute Of Astronomy (Cambridge)
• VAB — Vehicle Assembly Building
• FES — Fine Error Signal
• WAXS — Wide Angle X-ray Scattering
• NRAO — National Radio Astronomy Observatory (Greenbank, WV)
• NAMN — North American Meteor Network
• SPIE — The Society of Photo-optical Instrumentation Engineers

• HGA — High Gain Antennae
• VSOLJ — Variable Star Observers League in Japan
• CCL — Closed Conference Loop
• SGF — SpaceGuard Foundation
• MDA — Medical Device Amendments
• JETRO — Japan External Trade Organization
• PBOSO — Publications of the Bosscha Observatory Lembang
• RGOO — Royal Greenwich Observatory Observations
• MTI — Minnesota Technology Inc
• LBN — Lynds Bright Nebula
• NAHC — National Association of Home Care
• NEAF — North East Astronomy Forum
• CO — Contracting Officer
• EUCOMED — European Confederation of Medical Suppliers Associations
• SPED — Space Education
• DENIS — Deep Near-Infrared Survey
• SV — Science Verification
• FACC — Ford Aerospace Communications Corporation
• EUV — Extreme Ultra-Violet 2
• AGN — Active Galactic Nucleus
• TDRS — Tracking and Data Relay Satellites
• TTP — Time to Perigee
• GRO — Gamma Ray Observatory (NASA)
• QTG — Quantum Theory of Gravity
• AAO — Anglo-Australian Observatory
• IPA — Institute for Polyacryclate Sciences
• RAPS — radiologists, anesthesiologists, and pathologists
• KTB — Cretaceous-Tertiary Boundary
• CSPN — Central Star of Planetary Nebula
• MTWAR — Mount Wilson and Palomar Observatory Annual Report
• AGK3 — Katalog der Astronomischen Gesellschaft 3
• ROAN — Royal Observatory Annals
• WFC — Wide-Field Camera
• SIP — Sickness Index Profile
• CARA — California Association for Research in Astronomy
• SPP — Subset Preprocessor
• BCS — Bragg Crystal Spectrometer
• LIGO — Laser Interferometer Gravitational-Wave Observatory
• PEB — Performance Evaluation Board
• SWAT — Swift Action Team
• ASIM — American Society of International Medicine
• BDF — Block Data Format
• VBO — Vainu Bappu Observatory
• MONGO — Interactive graphics software package
• SQPK — staggered quadrature phase shift keying
• SN — SuperNova
• COTS — Cheap Off the Shelf
• SP — Solar Physics
• PVSS — Publications of Variable Star Section
• LVPS — Low Voltage Power Supply

• MDR — Medical Device Register
• RGOB — Royal Greenwich Observatory Bulletin
• TAR — Test Authorization Request
• MDMA — Medical Device Manufacturers Association
• MTWRE — Mount Wilson and Palomar Observatory Reprints
• SSDF — Space Science Development Facility
• SPDM — Special Purpose Dextrous Manipulator
• LRO — Large Radio Observatory
• SPAN — Space Physics Analysis Network
• A/D — Analog to Digital (conversion)
• IGY — International Geophysical Year (1 July 1957 - 31 December 1958)
• JGR — Journal of Geophysical Research
• SERAJ — Serbian Astronomical Journal
• BRITE — Bright-Star Target Explorer
• TOCC — TDRS Operations Control Center
• USAFA — United States Air Force Academy
• SJC — slit jaw camera
• ABB — After the Big Bang
• WILOO — Williamstown Observatory Observations
• TOKAB — Tokyo Astronomical Bulletin
• IFCC — International Federation of Clinical Chemists
• CAI — Calcium Aluminum-rich Inclusion
• SNAP — Structural Network Analysis Program
• NACA — National Advisory Committee on Aeronautics
• RA — Research Assistant
• NOCC — Network Operations Control Center (GSFC)
• SYDOP — Sydney Observatory Papers
• STSKY — Star Sky
• DCF — Data Capture Facility
• HVR — Hyper-Variable Region
• PVASO — Publications of the Vassar College Observatory
• SIMBAD — Set of Identifications, Measurements, and Bibliography for Astronomical Data
• VDC — Volts, Direct Current
• QE — Quantum Efficiency
• DQE — Detector Quantum Efficiency
• SAA — South Atlantic Anomaly
• TEP — Transits of Extrasolar Planets
• PERI — Pharmaceutical Education & Research Institute
• QV — quick visual
• GRS — Gamma Ray Spectrometer
• FPA — Floating Point Accelerator
• BMDO — Ballistic Missile Defense Office
• DADS — Data Archive and Distribution System
• TOKRE — Tokyo Astronomical Observatory Reprints
• MDR — Medical Device Reports
• GTO — Guaranteed Time Observer
• ST-ECF — Space Telescope - European Coordinating Facility
• XUV — Extreme Ultraviolet
• TEC — Thermal Electric Cooler
• PYUNO — Publications of the Yunnan Observatory

• SOPH — Solar Physics
• ODC — Other Direct Cost
• EA — Eclipsing Algol
• GLOB — Globular
• GVI — Global Village Idiot
• DQF — Data Quality File
• CCLRC — Central Laboratory of the Research Councils
• VRCS — Vernier Reaction Control System
• WMAP — Wilkinson Microwave Anisotropy Probe
• IUEDAC — IUE satellite Data Analysis Center
• MBBNET — Minnesota Biomedical Business Network
• TGF — Terrestrial Gamma-Ray Flash
• MODIS — Moderate Resolution Imaging Spectroradiometer
• STERE — Steward Observatory Reprints
• GMC — Giant Molecular Cloud
• SWEEPS — Sagittarius Window Eclipsing Extrasolar Planet Search
• BOOK — Bio Optical Organized Knowledge
• SPIF — Shuttle/POCC Interface Facility
• STMAP — Studies in Mathematical Physics
• ZAMS — Zero Age Main Sequence, a star that has just become a main-sequence star (i.e. a star that has begun burning hydrogen in its core)
• CWS — Committee on World Standards
• NESSI — Near Earth Space Surveillance Initiative
• KBO — Kuiper Belt Object
• LCRS — Las Campanas Redshift Survey
• PK — Perek-Kohoutek
• MVCA — Minnesota Venture Capital Association
• QZ — Quasi Zenith
• IPPPSSOOT — file naming convention for HST data sets
• LPI — Lunar and Planetary Institute
• OLT — Observatory Level Test
• GML — Galactic Modeling Language
• MACHO — Massive Compact Halo Object
• ODE — Office of Device Evaluation
• THAST — Theoretical Astrophysics
• UPPOR — Uppsala Astronomical Observatory Reports
• SPRRE — Sproul Observatory Reprints
• ISO — Imaging Spectrometic Observatory
• GEO — Geosynchronous Earth Orbit
• NAS — Norsk Astronomisk Selskap
• ZD — Zenith Distance
• S&T — Sky & Telescope
• SM — Standard Model
• SED — Spectral Energy Distribution
• SDP — science data packet
• OPB — Observation Planning Branch
• P&A — Physics and Astronomy
• IDMP — International Daylight Measurement Program
• JCMT — James Clerk Maxwell Telescope
• SRON — Space Research Organization of the Netherlands
• SFS — Smallest Feature Size

• ACV — Alpha Canes Venatici
• PSF — Point Spread Function
• LDEF — Long Duration Exposure Facility (for Spacecraft Material Testing)
• OCC — Operations control center
• OMS — Observatory Monitoring System
• CCAR — Colorado Center for Astrodynamics Research
• D/A — Digital-to-Analog
• AVWG — Assembly and Verification Working Group
• OCO — Oort Cloud Object
• ER — Eastern Range
• ASP — Astronomical Society of the Pacific
• A — Angstrom unit
• GAS — Getaway Special
• BHTA — British Healthcare Trades Industry
• JHU — The Johns Hopkins University (Baltimore, MD)
• TWA — TW Hydrae Association
• DSS — Digitized Sky Survey
• MTF — Modulation transfer function.
• WRORE — Wroclaw Astronomical Observatory Reprints
• TNO — Trans-Neptunian Object
• MA — Medical Alley
• APT — Automated Patrol Telescope
• NEO — Near Earth Object
• MSP — Millisecond Pulsar
• SAM — Small Angle Maneuver
• WKO — Well-Known Object
• IRFNA — Inhibited Red Fuming Nitric Acid
• SPD — Solar Physics Division
• HERA — Hermes Robotic Arm
• TECRV — Technology Review
• B/W — Black and White
• MMIC — Medical Manufacturers' Information Council
• DOC — Data Operations Center
• PWASO — Publications of the Washburn Observatory
• AXP — Anomalous X-Ray Pulsar
• SPWD — Space World
• IRAC — International Radio Advisory Committee
• GCVS — General Catalog of Variable Stars
• ERF — Energy Rejection Filter
• AAAD — Amateur Astronomers Association Delhi
• BAC — Bordeaux Astrographic Catalog
• SLAP — Space Link Access Protocol
• HIPO — Hierarchic Input-Process-Output
• ACRV — Astronaut Crew Rescue Vehicle
• MPC — Minor Planet Circulars
• SLTV — System Level Thermal Vacuum
• UBM — Unpressurized Berthing Mechanism
• UKIRT — United Kingdom Infrared Telescope
• WSO — Wilcox Solar Observatory
• OCS — Optical Control System

• TSTO — Two-Stage-To-Orbit
• STHCG — Studies in High Energy Physics Cosmology and Gravitation
• OC — Open Cluster
• RTV — Room Temperature Vulcanizer
• MACRO — Monopole, Astrophysics and Cosmic Ray Observatory
• CIP — Celestial Intermediate Pole
• PMDB — Project Management Data Base
• UST — Universal Standard Time
• FPA — Focal Plane Assembly
• CM/QA — Configuration Management/Quality Assurance
• AWG — Astronomy Working Group
• NOT — NOrdic Telescope
• VAFB — Vandenberg Air Force Base
• LFT — Luyten Five-Tenths
• MER — Mars Exploration Rover
• CELT — California Extremely Large Telescope
• STARCAT — Space Telescope Archive Catalog
• LGRB(S) — long gamma ray burst(s)
• ACM — Asteroids Comets Meteors
• PAD — Pulse Amplitude Discriminator
• GSPC — Guide Star Photometry Catalog
• PLSS — Portable Life Support System
• MIDAS — Munich Image Data Analysis System
• PODPS — Post Observation Data Processing System
• CMC — Carlsberg Meridian Catalogue
• IPNS — Intense Pulsed Neutron Source
• VFN — virtual file name
• CVC — Current-to-Voltage Converter
• HLV — Heavy Lift Vehicle
• ATR — Absolute Time Reference
• AAA — Amateur Astronomers Association
• EJASA — Electronic Journal of the Astronomical Society of the Atlantic
• FEM — Finite Element Model
• SPIEL — Signal Processing Interactive Extensible Language
• PRESTO — Project to Re-Engineer Space Telescope Observing
• STOL — Systems Test and Operations Language
• MS — Meteor Scattering
• PASP — Proceedings of the Astronomical Society of the Pacific
• AGK — Astronomische Gesellschaft Katalog
• VLT — Very Large Telescope
• SPA — Solar Panel Assembly
• MTR — Mean Time to Restore
• BSG — Blue SuperGiant
• UGSU — UG SU Ursae Majoris
• LCG — light curve generator
• SCAS — Southern Cross Astronomical Society, Inc.
• PASP — Publications of the Astronomical Society of Pacific
• RICAP — Roma International Conference on Astroparticle Physics
• C&A — calibration and analysis
• XN — X-ray Nova

• ORB — Observatoire Royal de Belgique (Royal Observatory of Belgium)
• AEA — Atomic Energy Agency
• UIC — User Identification Code
• CREAM — Cosmic Ray Energetics and Mass
• ETR — Engineering Tape Recorder
• SST — Software Support Team
• CBS — Contract and Business Services
• WCFZ — Worst Case Fresnel Zone
• RPO — Research Programs Office
• ARGOS — Advanced Research Global Observation Satellite
• SSC — Science Support Center
• CISCO — Cooled Infrared Spectrograph and Camera for OHS
• EAAS — East Antrim Astronomical Society
• WSMR — White Sands Missile Range (whiz-murr)
• RVGSP — Reviews of Geophysics and Space Physics
• USNOR — United States Naval Observatory Reports
• STR — Science Tape Recorder
• IDM — Intelligent Database Machine
• MCG — Morphological Catalog of Galaxies
• TMTE — Telemetry Test Equipment
• PWD — Pre-White Dwarf
• JWST — James Webb Space Telescope
• THEMIS — Thermal Emission Imaging System
• OTHB — Over The Horizon Backscatter
• RRAT — Rotating RAdio Transient
• NEA — Near-Earth Asteroid
• CVZ — Continuous Viewing Zone (Hubble Space Telescope; US NASA)
• CSS — Catalina Sky Survey
• MCSA — Mir Cooperative Solar Array
• SNR — SuperNova Remnant
• AET — Accuracy Enhancing Technology
• PAM-D — Payload Assist Module, Delta-class
• NGS — National Geographic Society
• ITA — Institute of Theoretical Astronomy
• SJR — Software Justification Report
• CM — Center of Mass
• LERC — Lewis Research Center
• MLI — Multilayer Insulation
• VOIR — Venus Orbiting Imaging Radar
• SRS — Stellar Radiation Sensor
• EAPU — External Auxiliary Power Unit
• TAI — International Atomic Time
• NPS — North Polar Sequence
• QPOE — Quick Position Oriented Event
• RNGC — Revised New General Catalog
• DMS — Data Management Subsystem
• TKSC — Tsukuba Space Center
• AXAF — Assembly and Verification Working Group
• SIF — Science Instrument Formatter
• XSC — Extended Source Catalog

• ATCA — Australia Telescope Compact Array
• CAAA — Capital Area Astronomy Association
• CDCA — Centre de Depoiullement des Cliches Astronimiques
• SP — sun point
• STL — science trailer line
• SAL — Space Astronomy Laboratory (Univ. Wisconsin, Madison WI)
• LP — Luyten Palomar
• B/L — Baseline
• PFI — Partial Frame Image
• IRDC — Infrared Dark Cloud
• AEDP — Astrometry and Engineering Data Processing
• DDCU — DC-to-DC Converter Unit
• NM — Non-Moment
• UDMH — Unsymmetrical Dimethyl Hydrazine (Alar Metabolite)
• ASP — Analog Signal Processor
• CFCP — Center for Cosmological Physics
• LBV — Luminous Blue Variable
• RV — Radial Velocity
• SOUST — Southern Skies
• RASS — ROSAT All-Sky Survey
• UIT — Ultraviolet Imaging Telescope
• PSR — Project Status Review
• RAG — Radio Astronomy Group
• IQL — Interactive Query Language
• FIRST — Far InfraRed and Submillimeter Space Telescope
• SIB — Science Instrument Branch
• DDTE — Design, Development, Test, and Evaluation
• SFC — Space Forecast Center
• RC — Ritchey-Chretien
• GST — Ground System Test
• SETA — Search for Extra Terrestrial Artifacts
• RXTE — Rossi X-Ray Timing Explorer
• ACS — Advanced Camera for Surveys
• UMCP — University of Maryland College Park
• XMM — X-ray Multi Mirror
• SKA — Square Kilometre Array
• SSGSR — Springer Verlag Springer Series on Group Geophysics Space Research
• HDOS — Hughes Danbury Optical Systems (Danbury CT)
• C/C — configuration control
• CSLG — Campus-wide Software License Grants Program
• BATC — Beijing-Arizona-Taiwan-Connecticut
• BST — British Summer Time [GMT 0100]
• VERITAS — Very Energetic Radiation Imaging Telescope Array System
• SETI — Search for Extra Terrestial Intelligence
• PDBI — Plateau de Bure Interferometer
• LENA — Low Energy Neutrino Astronomy
• SEB — Source Evaluation Board
• RFT — Rich Field Telescope
• VLBA — Very Long Baseline Array
• MAST — Multimission Archive at Space Telescope

• SCSP — Science and Culture Series Physics
• OGSE — Optical Ground Support Equipment
• BEM — Bug-Eyed Monster (Late 40's-early 50'soft-used, and still in use, Sci-Fi term)
• DLR — Deutschen Zentrum für Luft- und Raumfahrt
• ACP — Aerosol Collector and Pyrolyser
• AIT — Assembly, Integration, and Testing
• FPSA — FPA Structure Assembly
• OCB — Operational Configuration Baseline
• TAU — Thousand Astronomical Unit
• CMT — Carlsberg Meridian Telescope
• PSL — Program Support Library
• PNG — Planetary Nebulae, Galactic
• NEMP — Nitrogen-Enhanced Metal-Poor
• SEP — System Enhancement Plan
• NICMOS — Near-Infrared Camera and Multi-Object Spectrometer
• CCO — Catalogue of Cometary Orbits
• IRAIT — International Robotic Antarctic Infrared Telescope
• SMBH — Super Massive Black Hole
• GSOWG — Ground Systems Operations Working Group
• PV — photovoltaic (solar)
• VELLO — Very Low Luminosity Object
• FGSAA — FGS Access Area
• ETC — Estimated Time to Completion
• SAGA — Solar Array Gain Augmentation
• AAS — Archaeology Astronautics and Seti
• WAA — Wiener Arbeitsgemeinschaft für Astronomie
• UCSD — University of California San Diego
• R&I — Receiving and Inspection
• LIRG — Luminous Infrared Galaxy
• SAS — Science Analysis Software
• EMP — Extremely Metal-Poor
• SOFA — Standards of Fundamental Astronomy
• MPCS — Minor Planet circulars Supplement
• CPMM — characters per millimeter
• ZPF — Zero-Point-Fluctuation
• DVA — Detector Vacuum Assembly
• IRAC — Infrared Array Camera
• ESTEC — European Space Technology Center
• SERF — Space Environment Research Facility
• SF — Star Field
• DN — Dwarf Nova
• ESS — Engineering Support System
• GXY — Galaxy
• GEIS — Generic Edited Information Set
• MMR — Mean-Motion Resonance
• PRE — Photospheric Radius Expansion
• VAC — Volts, Alternating Current
• HFQPO(S) — high-frequency quasi-periodic oscillation(s)
• ESTR — Engineering and Science Tape Recorder
• CTIO — Cerro Tololo Inter-American Observatory

• OSS — Observation Support System
• TASS — The Amateur Sky Survey
• RMS — Record Management System
• ETRD — Engineering Tape Recorded Data
• BLO — Bl Lac Object
• DS — Dwarf Star
• CDIMP — Catalogue of Discoveries and Identifications of Minor Planets
• SSU — Steady State Universe
• ETOL — ESA Test and Operations Language
• SQM — Strange Quark Matter
• BRAVO — Back-End Redesign for Added Value for Observers
• OPD — Operations and Data Processing Division
• SCARS — Science Computing & Research Support Division
• ICF — Intrinsic Correlation Function
• SXT — Soft X-Ray Telescope
• COL — Collinder catalog
• LTM — Like The Moon
• LSO — Large Solar Observatory
• NR — Non-Relativistic
• TTC — telemetry, tracking, and command
• LITVC — Liquid Injection Thrust Vector Control
• SSO — Special Studies Office
• SANSA — South African National Space Agency
• FOCAS — Faint Object Classification and Analysis System
• RC — Relativistic Correction
• LDEO — Lamont-Doherty Earth Observatory
• DSOB — Data Systems Operations Branch
• FSS — Flight Servicing System
• SVWG — Science Verification Working Group
• APSB — Advance Planning Systems Branch
• PSI — Planetary Science Institute
• PFS — Percent Full Scale
• IFT — Inverse Fourier Transform
• TCB — Barycentric Coordinate Time
• QPO — Quasi-periodic Oscillation
• STERJ — Solar, Terrestrial and Environmental Research Japan
• SQPN — staggered quadriphase pseudo-random noise
• TAROT — Télescope à Action Rapide pour les Objets Transitoires
• CASB — Catalogs and Survey Branch
• DCEP — Delta Cepheid
• CNSR — Comet Nucleus Sample Return
• MPF — Mars PathFinder
• BBH — Big Black Hole
• ADIL — Astronomy Digital Image Library
• HB — Hot Bands
• CAAS — Central Arkansas Astronomical Society
• EAFB — Edwards Air Force Base
• GLOW — Gross Lift-Off Weight
• SPRL — Space Physics Research Laboratory
• CRAP — Completely Radical Anthropic Principle

• ACS — Actuator Control System
• RQZ — Radio Quiet Zone
• ZOF — zone of exclusion
• PPF — Payload Processing Facility (USAF)
• FFD — First Fixation Duration
• MUSTANG — Multiplexed SQUID TES Array at Ninety GHz
• SIA — Solar Inertial Attitude
• FPAS — FPA Shroud
• BCCP — Berkeley Center for Cosmological Physics
• CMCC — Central Mission Control Centre
• GC — Galactic Center
• STAVF — Space Telescope Assembly and Verification Facility
• CADC — Canadian Astronomical Data Center
• TIB — Telescope Instrument Branch
• WIRCAM — Wide-field InfraRed Camera, instrument on the Canada-France-Hawaii Telescope
• IARA — Italian Amateur Radio Astronomy
• GMRT — Giant Meter-wave Radio Telescope
• RNP — Rotation, Nutation and Precession
• SMOV — Servicing Mission Observatory Verification
• TO — target of opportunity
• DCA — Detector Control Assembly
• LC — Las Campanas observatory
• WAA — Westchester Amateur Astronomers
• SEI — Space Exploration Initiative
• GPB — Group Parameter Block
• OPO — Operations Project Office
• IMSL — International Mathematical and Statistical Library
• OSCAR — Orbital Satellite Carrying Amateur Radio
• OCST — Office of Commercial Space Transportation
• STIF — Software Test and Integration Facility
• UGSS — UG SS Cygni
• SNII — SuperNova of Type II
• MSTO — Main Sequence Turn-Off
• CIBR — Cosmic Infrared Background Radiation
• ECT — Equator Crossing Time
• AQR — Aquarius
• LCDM — Lambda Cold Dark Matter
• IPPW — International Planetary Probe Workshop
• BITP — Bogolyubov Institute for Theoretical Physics
• VZA — Viewing Zenith Angle
• LST — Local Sidereal Time
• BOAO — Bohyunsan Optical Astronomy Observatory
• ASAS — All Sky Automated Survey
• Q&A — qualification and acceptance
• TFMRP — Transfer Function Mode Reduction Package
• IB — Interstellar Band
• MWO — Mount Wilson Observatory
• STSDAS — Space Telescope Science Data Analysis System
• WISARD — Web Interface for Searching Archival Research Data
• RLOF — Roche Lobe Overflow

• GOX — Gaseous Oxygen
• ROLUN — Reports of the Lund Observatory
• SIMA — Secondary Mirror Incremental Motor Actuator
• NDC — Network Data Center
• SPT — South Pole Telescope
• ETI — Extraterrestrial Intelligence
• SGRB(S) — short gamma ray burst(s)
• DBW — decibel reference to 1 watt
• RSB — Research Support Branch
• WTR — Western Test Range
• ESB — Engineering Support Branch
• CFCO — Committee for Crescent Observation
• ICRC — International Cosmic Ray Conference
• VPC — viewport coordinates
• R-L — Richardson-Lucy
• HLO — High Light Output
• ZAP — Z Axis Precession
• ULE — Ultralow Expansion
• ZHR — Zenith Hourly Rate
• SMM — Solar Maximum Mission
• HTHL — Horizontal Takeoff Horizontal Landing
• PSR — Pulsar Supernova Remnant
• AUDS — ALFA Ultra Deep Survey
• CSV — Catalog of Suspected Variables
• PNNV — Planetary Nebula Nucleus Variable
• MAG — Magnitude
• IWCA — International Workshop on Cometary Astronomy
• XCS — XMM Cluster Survey
• PCT — Program Coordinator Team
• TOYAL — Transactions of the Astronomical Observatory of Yale University
• LUT — Lookup Table
• SDMS — Spatial Data Management System
• PNN — Planetary Nebula Nucleus
• ELIAS — European Large Area ISO Survey
• SXR — Soft X-Ray
• CSPAR — Center for Space Plasma and Aeronomic Research
• OCX — observation comments file
• VSSCI — Variable Star Section Circulars
• EARS — Electrostatic Atmospherics Radio Sensor
• SAOCO — Smithsonian Astrophysical Observatory - Contributions to Astrophysics
• MV — absolute visual magnitude
• SCP — Science Data Analyst
• SWAS — Submillimeter Wave Astronomy Satellite
• YSO — Young Stellar Object
• OPUS — OSS and PODPS Unified Systems
• IAU — International Astrophysical Union
• SMM — Spectro-Mirror Mechanism
• PWM — pulse width modulated
• IVC — Institute Visiting Committee
• TML — Total Mass Loss

• JFC — Jupiter Family Comets
• MOTV — Manned Orbital Transfer Vehicle
• SB — Spectroscopic Binary
• BPM — Bruce Proper Motion
• WAA — Western Amateur Astronomers
• SSSPM — SuperCOSMOS Sky Survey Proper Motion
• ORR — Orbit Readiness Review
• SMO — Servicing Mission Office
• SPSS — Science Planning and Scheduling System
• BCVS — Bibliographic Catalogue of Variable Stars
• CM — Critical mass
• GCC — Globular Cluster Candidate
• HVPS — High Voltage Power Supply
• ODL — Observation Data Log
• ABBA — ADC Backend For Bolometer Array
• QPSK — quadriture phase shift keying
• STIF — Science and Technology Information Facility
• NRF — National Research Foundation
• EVAC — East Valley Astronomy Club
• IRTF — Infrared Telescope Facility
• OSB — Operations Software Branch
• T&E — Test and Evaluation
• CG — Compact Galaxy
• LINER — Low Ionization Nuclear Emission Region
• EBE — Extraterrestrial Biological Entity
• ISPM — International Solar Polar Mission
• TECU — Technology and Culture
• MOXE — MOnitoring X-Ray Experiment
• ADAF — Advection-dominated Accretion Flow
• ♅ — Uranus
• ODAS — OCA (Observatoire de la Côte d'Azur) - DLR (Deutschen Zentrum für Luft- und Raumfahrt) Asteroid Survey
• DSOS — Dish Surface Optimization System
• IIPS — Interactive Image Processing System
• DPOSS — Digitized Palomar Observatory Sky Survey
• KAO — Kuiper Airborne Observatory
• COMPTEL — Compton Telescope
• PRB — Preliminary Review Board
• SIC — Spacecraft Identification Code
• VMC — Velocity Modulating Camera
• PORTS — Preliminary Operations Requirements and Test Support
• STOCC — Space Telescope Operations Control Center (GSFC, Greenbelt MD)
• LSG — Liaison Scientists Group
• TYC — Tycho
• EAAA — Escambia Amateur Astronomers Association
• NIMS — Near-Infrared Mapping Spectrometer
• WCS — World Coordinate System
• PTF — Payload Test Facility
• UGWZ — U Gem variable type star (WZ Sagittae sub-type)
• IWG — Interface Working Group
• IV — intra vehicular

• FDI — failure detection and isolation
• LOSS — Lick Observatory Supernova Search
• TIC — Tycho Input Catalog
• FEB — Falling-Evaporating Body
• LDE — Long Duration Event
• SER — Systems Engineering Report
• VPU — video processing unit
• SAOC — SAO Catalog
• EAPJ — Electronic AstroPhysical Journal Letters
• PROS — Post Reduction Offline Software
• CEMP — Carbon-Enhanced Metal-Poor
• RTC — Researching The Cosmos
• PMIRR — Pressure Modulated InfraRed Radiometer
• HSI — Host System Interface
• SAO — Swinburne Astronomy Online
• ASKAP — Australian Square Kilometre Array Pathfinder
• MOWG — Mission Operations Working Group
• AOC — Award Of Contract
• NAIF — Navigation Ancillary Information Facility
• SIPS — Southern Infrared Proper Motion Survey
• LFAE — Light Field Attribute Explorer
• CC — Candidate Companion
• SSD — Science Support Division
• CSAA — Committee on Space Astronomy and Astrophysics
• LP — Lonely Planet
• GEM — Galileo Europa Mission
• ALAT — Airborne Large Aperture Telescope
• FASTT — Flagstaff Astrometric Scanning Transit Telescope
• LOTOSS — Lick Observatory and Tenagra Observatory Supernova Searches
• MSOCC — Multisatellite Operations Control Center
• CMBR — Cosmic Microwave Background Radiation
• SDA — Science Data Analyst Small Computer Systems Interface
• PEPSI — PEP System
• VILCO — Villanova University Observatory Contributions
• DSD — Data Systems Division
• HTVL — Horizontal Takeoff Vertical Landing
• CG — Cometary Globule
• GAF — Geographic Adjustment Factor
• NGS — New Generation STAR
• MONS — Measuring Oscillations in Nearby Stars
• SEA — Sensor Electronics Assembly
• CST — Constant
• TIUCS — Transactions of the International Union for Cooperation in Solar Research
• LHS — Luyten Half-Second
• OST — Observation Sequence Table
• DAG — Doğu Anadolu Gozlemevi
• SOB — Science Observatory Branch
• PFM — Pre-Flight Module
• EF — Event Foreground
• SS — Safing System

• NCSA — National Center for Supercomputer Applications (Urbana IL)
• BAV — Bundesdeutsche Arbeitsgemeinschaft fur Veraenderliche Sterne
• LMSC — Lockheed Missile and Space Corporation
• BZ — Brillouin zone - a uniquely defined primitive cell in reciprocal space
• OFAD — Optical Field Angle Distortion
• SDF — Science Data Formatter
• PEPE — Plasma Experiment for Planetary Exploration
• PEP — PhotoElectric Photometry
• ADAS — Asiago DLR Asteroid Survey
• FRAS — fellow of the Royal Astronomical Society
• ACK — acknowldgement message
• WGAS — Working Group on Astronomical Software
• MLY — Mega Light Year
• KIC — Kepler Input Catalog
• STIC — Space Telescope Institute Council
• IPMO — Isolated Planetary-Mass Objects
• TZO — Thorne-Å»ytkow Object
• E — Eclipsing
• AESS — Institute of Electrical and Electronic Engineers - Aerospace and Electronics Systems Society
• SPB — Science Planning Branch
• MSC — Mission Support Calibration
• RCS — Readiness Control System
• POCC — Payload Operations Control Center
• AEG — Astro Event Group
• LRG — Luminous Red Galaxy
• AOSS — AURA Observatory Support Services
• CRAQ — Centre for Research in Astrophysics of Québec
• ENE — East North East
• DOV — Director of Orbital Verification
• DAV — Deerlick Astronomy Village
• SUMER — Solar Ultraviolet Measurements of Emitted Radiation
• SMS — Sun Moon and Stars
• ULX — Ultra-Luminous X-ray source
• HSC — Hierachical Storage Controller
• PASS — POCC Application Software Support
• CNS — Computing and Network Services
• OAO — Orbiting Astronomical Observatory
• AVO — Astrophysical Virtual Observatory
• EAC — European Astronaut Centre
• DDF — Directors Discretionary Funds
• SUPRIME — SUbaru PRIME focus CAMera
• DEFCAL — deflection calibration
• CCDS — Centers for the Commercial Development of Space
• UGWZ — UG WZ Sagittae
• FF — Flat Field
• EMP — Ephemerides of Minor Planets
• DM — Dark Matter
• BSS — Blue Straggler Star
• GSP — General Support Pool
• AGAPE — Andromeda Galaxy and Amplified Pixels Experiment

• SMM — science mission management
• SCAC — Science Computing Advisory Commitee
• EROS — Earth Resources Observation Satellite
• STAC — Space Telescope Advisory Council
• RPI — Rensselaer Polytechnic Institute (Rensselaer, NY)
• UGZ — UG Z Camelopardalis
• CXO — Chandra X-ray Observatory
• CODE — Creation Out of Deep Energy
• SOFIA — Stratospheric Observatory for Infrared Astronomy
• GRS — Great Red Spot
• MDB — multiplexed data bus
• VSSRE — Variable Star Section Reprints
• SIS — SETI (Search for Extra-Terrestial Intelligence) Intercept System
• ECA — Electronics Control Assembly
• PAR — Photon Activity Rate
• SCP — Small Computer Systems Interface
• EDB — Engineering Data Base
• LEST — Large Earth-based Solar Telescope
• RC — Red Clump
• GBT — Green Bank Telescope
• PNS — Pulsed Neutron Source
• ASWG — Astronomical Science Working Group
• CXBR — Cosmic X-ray Background Radiation
• SUGRA — Supergravity
• CVAS — Chippewa Valley Astronomical Society
• GRB — Gamma Ray Bursters
• US/PS — see PRESTO
• WFPC2 — Wide Field Planetary Camera-2
• ECF — European Coordinating Facility
• STDN — Satellite Tracking and Data Network
• RPSS — Remote Proposal Submission System
• EKBO — Edgeworth-Kuiper Belt Object
• IMIO — Image Input/Output
• WRO — Warren Rupp Observatory
• ILOC — International Lunar Occultation Center
• XBP — X-Ray Bright Point
• SOARD — Steward Observatory Asteroid Relational Database
• BCD — Basic Calibrated Data
• AER — Astronomy Education Review
• VHE — Very High Energy
• SDAS — Scientific Data Analysis System
• CCITT — Consultative Committee on International Telegraph & Telephone
• RS — Reed-Solomon error detection
• TAUVEX — Tel Aviv University Ultraviolet Explorer
• ODS — Our Dark Skies
• USMP — United States Microgravity Payload
• CCO — Central Compact Object
• SCSA — Science and Culture Series Astrophysics
• ISEE — International Sun Earth Explorer
• NGT — Next Generation Telescope

• MW — Milky Way
• AAAM — Active Amateur Astronomers of Maryland
• BDEC — Bendix Field Engineering Corporation
• DBSA — Database and System Administration team
• PGPLOT — FORTRAN subroutine library for plotting graphics
• SSA — Star Selector Assembly
• CCAS — Cape Cod Astronomical Society
• SPE — Static Phase Error
• WFCAM — Wide Field Camera
• RTLT — Round Trip Light Time
• MEM — Maximum Entropy Method
• PTF — Palomar Transient Factory
• LV — Lunette Verte
• SIAF — Science Instrument Aperture File
• HEO — Highly Elliptical Orbit
• MEPCO — Meeting of European Planetary and Cometary Observers
• PMPS — Parkes Multibeam Pulsar Survey
• CRTS — Centre Royal de Teledetection Spatiale
• NLTT — New Luyten Two-Tenths
• SIP — Software Implementation Plan
• SSB — Science Software Branch
• SAR — Software Analysis Room
• CTWG — Calibration Targets Working Group
• LMST — Local Mean Sidereal Time
• OBP — Onboard Processor
• MOID — Minimum Orbit Intersection Distance
• SXG — Spectrum-X-Gamma
• KAIT — Katzman Automatic Imaging Telescope
• DCL — Digital Control Language
• ACA — Atacama Compact Array
• UKST — United Kingdom Schmidt Telescope
• CCIR — Comit? Consultatif International Pour La Radio (French For Consultative Committee On International Radio
• MOSES — Mission Operations and Systems Engineering Support
• NOMAD — Naval Observatory Merged Astrometric Dataset
• GRU — Ground Replaceable Unit
• SPC — Short Period Comets
• NAO — National Astronomy Olympiad
• MPP — multi-pinned phase
• SSC — STEIS Steering Committee
• STVSW — Space Telescope Verification Software
• AH — ampere hours
• SCL — Service Control Level
• CRL — Compound Refractive Lens
• CCMS — Command Control and Monitor System
• SFN — Star Formation Newsletter
• SMC — Standard Model of Cosmology
• SIPE — Science Instrument Protective Enclosure
• LSA — Large Science Aperture
• VRSD — Verification Requirements and Specifications Document
• PDS — Photometric Data Systems

• SPYBAL — spectrum Y balance
• NLTE — Non-local Thermodynamic Equilibrium
• AJD — Astronomical Julian Day
• UNPSA — United Nations Programme on Space Applications
• MOST — Microvariability and Oscillations of STars Telescope
• CEP — CEPheid
• CMOS — Complimentary Metal Oxide Semiconductor
• RABF — Radio Astronomy Bandstop Filter
• SID — Software Implementation Directive
• CSWA — Committee on the Status of Women in Astronomy
• APASS — AAVSO Photometric All-Sky Survey
• WF/PC — Wide Field/Planetary Camera
• WFAO — Wide Field Adaptive Optics
• WIRE — Wide-Field Infrared Explorer
• CFHT — Canada-France-Hawaii Telescope
• WSGS — White Sands Ground Station
• WKAA — West Kentucky Amateur Astronomers
• EOR — End of Record
• NEAT — Near Earth Asteroid Tracking
• SHAD — Stellar Horizon Atmospheric Dispersion
• TAAA — Tucson Amateur Astronomy Association
• GIMP — Geomagnetically Induced Motion Problem
• SIDS — SI Detector System
• ALTS — Astronomy Lunch Time Seminar
• ACURA — Association of Canadian Universities for Research in Astronomy
• ECEF — EarthCentered EarthFixed
• FAST — Fast Auroral Snapshot Explorer
• SDM — Secondary Deployment Mechanism
• NODO — NASA Orbital Debris Observatory
• BSS — Bigelow Sky Survey
• ICSO — International Conference on Space Optics
• TFOV — target field of view
• BATTERS — Bisei Asteroid Tracking Telescopes for Rapid Survey
• GCI — geocentric intertial
• WOMBAT — Wavelength-Oriented Microwave Background Analysis Team
• HAC — Huachuca Astronomy Club
• SWRI — Southwest Research Institute
• DRS — Direct Receiving Station
• RSFC — Radially Stratified Flame Core
• AMSU — Advanced Mass Spectrometry Unit
• STEIS — Space Telescope Electronic Information System
• CAMAC — Computer-Aided Measurement and Control
• EOSL — Earth Observation Systems Laboratory
• SESD — Science and Engineering Systems Division
• NEAP — Near Earth Asteroid Prospector
• TRACE — Transition Regional and Coronal Explorer
• SINGS — Spitzer Infrared Nearby Galaxies Survey
• SOGS — Science Operations Ground System
• DE — Dwarf elliptical
• TO — Texas Instruments

• SDH — science data header
• ARAA — Annual Review of Astronomy and Astrophysics
• HAO — High Altitude Observatory (NCAR)
• RORF — Radio/Optical Reference Frame
• RGA — Rate Gyro Assembly
• CODMAC — Committee on Data Management and Computing
• VRM — Venus Radar Mapper
• FGC — Flat Galaxy Catalogue
• DDA — Division on Dynamical Astronomy
• VVDS — VIMOS-VLT Deep Survey
• CINEOS — Campo Imperatore Near-Earth Object Survey
• CDBS — Calibration Data Base System
• MOMV — Manned Orbital Maneuvering Vehicle
• MICO — Multi-year Interactive Computer Almanac
• RMS — Remote Manipulator System
• HKO — Hong Kong Observatory
• EAAE — European Association for Astronomy Education
• RWA — Reaction Wheel Assembly
• COHSI — Cambridge OH-Suppression Instrument
• SLOI — Satellite Lake Observatory Initiative
• SIMM — Standard Inline Memory Module
• SAREX — Search and Rescue Exercise
• PWN — Pulsar Wind Nebula
• MSO — Mount Stromlo Observatory
• SSE — Star Selector Encoder
• SHAR — Stellar Horizon Atmospheric Refraction
• VF — Variable Frequency
• SMA — Submillimeter Array
• SSRV — Space Science Reviews
• VIMOS — Visible Multiobject Spectrograph
• CRRES — Combined Release Radiation Effects Satellite
• ACIS — Advanced CCD Imaging Spectrometer
• RFO — Robert Ferguson Observatory
• SBIG — Santa Barbara Instrument Group
• CFS — Chandrasekhar - Friedmann - Schutz instability
• SEST — Swedish ESO Submillimeter Telescope
• CA — Coronagraphic Apodizer
• RMS — Republic Management Systems, Inc.
• NIU — NASCOM Interface Unit
• LWS — Long-Wave Spectrograph
• ECO — Earth crossing object
• RSS — Rotating Service Structure
• MOSS — Moving Object Support System
• QEH — Quantum Efficiency Hysteresis
• START — Solar Thermal Analysis Review and Training
• CTA — Computer Technology Associates (GSFC)
• CIAO — Coronagraphic Imager with Adaptive Optics
• RSG — Red Super Giant
• DSN — deep-space network
• CNES — Centre National d'Etude Spatiales

• SUVSR — Scandinavian Union of Amateur Astronomers Variable Star Section
• DCMF — Data Capture and Management Facility
• WFS — Wave Front Sensor
• E/A — Ephemeris/Attitude
• RSA — Revised Shapley-Ames
• XRB — X-Ray Background
• TRB — Test Review Board
• LONEOS — Lowell Observatory Near-Earth-Object Search
• PUSNO — Publications of the US Naval Observatory
• CVA — Central Valley Astronomers
• RRL — RR Lyrae
• TAC — telemetry and command processor
• SCT — Schmidt-Cassegrain Telescope
• MYSO — Massive Young Stellar Object
• SPG — Special Projects Group
• LWR — Long Wavelength Redundant
• IGI — Interactive Graphics Interpreter
• TAC — The Astronomy Connection
• CTTS — Classical T Tauri Star
• EIT — Extreme Ultraviolet Imaging Telescope
• IBBTF — Imagination Baffled By The Facts
• L — Lagrange
• EED — Extracted Engineering Data
• ASCA — Advanced Satellite for Cosmology and Astronomy
• MU — Memory Unit
• LMXB — Low-Mass X-Ray Binary
• BMO — Black Moving Object
• VCC — Virgo Cluster Catalog
• GRAB — Galactic Radiation and Background
• LSST — Large Synoptic Survey Telescope
• NGC — New General Catalog
• SEST — Swedish-ESO Submillimetre Telescope
• WAC — Wide Angle Converter
• MMA — Milli Modulation Amplitude
• IAAC — Internet Amateur Astronomers Catalog
• EHB — Extreme Horizontal Branch
• SSRT — Single Stage Rocket Technology
• LIC — local interstellar cloud
• RSAA — Research School of Astronomy and Astrophysics
• OVIWG — Orbital Verification Implementation Working Group
• WXQ — Waxing Quarter
• MKO — MAUNA KEA OBSERVATORY
• CCS — Cool Carbon Star
• ASTRO — Autonomous Space Transport Robotic Operations
• SZE — Sunyaev-Zeldovich Effect
• ERRSAC — Eastern Regional Remote Sensing Applications Center
• HMC — Halley Multicolor Camera
• IRS — International Reference Star
• STIS — Space Telescope Imaging Spectrograph
• GRAND — Gamma Ray and Neutron Detector (NASA)

• TAMS — Terminal-Age Main Sequence
• NTT — New Technology Telescope
• MLRS — McDonald Laser Ranging Station
• CHIP — Cosmic Hot Interstellar Plasma
• EGGR — Eggen & Greenstein
• SGD — Solar Geophysical Data
• SMC — Small Magellanic Cloud
• XIS — X-ray Imaging Spectrometer
• UAO — University of Arizona Observatories
• BHAS — Black Hills Astronomical Society
• FEAT — Fine Error Averaging Test
• B — Barnard
• VLB — Very Long Baseline
• GSSS — Guide Star Selection System
• ACYG — Alpha CYGni
• SS — System Simulator
• CANX — Canadian Advanced Nanospace Experiments
• TSRS — Trieste Solar Radio System
• ASIAA — Academia Sinica Institute of Astronomy and Astrophysics
• GAAC — Gloucester Area Astronomy Club
• NTR — Nuclear Thermal Rocket
• JKT — Jacobus Kapteyn Telescope
• EBA — Electronics Bay Assembly
• MBA — Main-Belt Asteroid
• GHZ — Galactic Habitable Zone
• SB — Super Bright
• SOFA — Selectable Optical Filter Assembly
• JSGA — Japan Spaceguard Association
• SQIID — Simultaneous Quad Infrared Imaging Device
• COMICS — Cooled Mid-Infrared Camera and Spectrometer
• LPCI — Lunar Phases Concept Inventory
• UG — U Geminorum
• ADS — Aitken Double Stars
• SOSYR — Solar System Research
• AAT — Anglo-Australian Telescope
• IYA — International Year of Astronomy
• WBS — Work Breakdown Schedule
• CIB — Cosmic Infrared Background
• LOFAR — Low Frequency Array
• NGST — Next Generation Space Telescope
• SSPS — Sky Survey Prototype System
• PSS — Palomar Sky Survey
• WYAS — West Yorkshire Astronomical Society
• LM — Low Mass
• BCEP — Beta CEPhei
• SCOA — Smithsonian Contributions to Astrophysics
• LTP — Lunar Transient Phenomenon
• DES — Dark Energy Survey
• AC — Ascendant Cusp
• SXARI — SX ARIetis

• TAI — International Atomic Time (Temps Atomique International) [to 2015 July 1st, 35s ahead of UTC; from 2015 July 1st, 36s ahead of UTC.]
• ORD — Operations Requirements Document
• PPM — Positions And Proper Motions (catalog)
• WDM — Warm Dark Matter
• MT — Moving Target
• MGC — Millennium Galaxy Catalogue
• TLP — The Lunascan Project
• VVS — Vereniging voor Sterrenkunde
• SAMPEX — Solar Anomalous And Magnetospheric Particle Explorer (spacecraft)
• DCX — Delta Clipper Experimental
• QBSA — Quarterly Bulletin on Solar Activity
• SIPS — Spectral Image Processing System
• FGE — Fine Guidance Electronics
• ACT — Astrographic Catalog Tycho
• MMTO — Multiple Mirror Telescope Observatory
• DN — Dwarf Novae
• MOLA — Mars Observer Laser Altimeter
• DIG — Dwarf Irregular Galaxy
• ULAS — Union List of Astronomy Serials
• IMOA — International Museum of Astronomy
• CNO — Carbon-Nitrogen-Oxygen
• PM — Primary Mirror
• LN2 — liquid N2
• RTA — Real Time Activity
• TESS — Transiting Exoplanet Survey Satellite
• GSY — Galactic Standard Year
• DIB — Diffuse Interstellar Band
• NDV — NASP Derived Vehicle
• RAMBO — Robust associations of massive baryonic objects
• CGCS — Cool Galactic Carbon Star
• MOR — Mission Operations Room
• LOTIS — Livermore Optical Transient Imaging System
• QE — Quality Engineer
• ROTSE — Robotic Optical Transient Search Experiment
• WIYN — Wisconsin Indiana Yale NOAO Telescope Consortium
• HPR — Hardware Problem Report
• LST — Large Stellar Telescope
• MGS — Mars Global Surveyor
• WDS — Washington Double Star
• NEAF — North East Astronomy Form
• WUVC — Wezen Updated Variability Catalogue
• MPEC — Minor Planets Electronic Circular
• SPSO — Science Program Selection Office
• LMS — Lower Main Sequence
• WFAP — Wide Field Astronomy Panel
• SPD — Science Programs Division
• MPS — Microlensing Planet Search
• MG — Meteor Garden
• RIACS — Research Institute for Advanced Computer Science
• ATPI — Astronomy Through Practical Investigations

• FAT — Filtered Array Technology
• MUSES — MU Space Engineering Spacecraft
• BHC — Black Hole Candidate
• SLSN-I — hydrogen-poor SLSNe
• MSE — Milton S. Eisenhower library
• PUAMS — Publications of the Astronomical Institute of the University of Amsterdam
• BCD — Blue Compact Dwarf
• XRF — X-Ray Flash
• FD — File Descriptor
• LINEAR — Lincoln Near Earth Asteroid Research
• R — Ray
• ULIRG — Ultraluminous Infrared Galaxy
• TAAS — The Albuquerque Astronomical Society
• GDSO — Georgi Dobrovolski Solar Observatory
• OV — Orbital Verification
• CST — Constant Strain Triangle
• WASP — Wide Angle Search for Planets
• SFD — SXT Full Disk
• MINISAT — Miniature Satellite
• LAMO — low altitude mapping orbit
• IAPPP — International Amateur/Professional Photoelectric Photometry
• WAT — Wide Angle Tail
• WSAL — Winston-Salem Astronomical League
• IRCS — Infrared Camera and Spectrograph
• PEGA — Programs in Extra-Galactic Astronomy
• LMT — Large Millimeter Telescope
• VGRF — Variable-Gravity Research Facility
• ODX — Occular Dynamic eXperiment
• REPT — Relativistic Electron-Proton Telescope
• CTRF — Celestial and Terrestrial Reference Frames
• ISSA — Infrared Sky Survey Atlas
• TB — Thermal Balance
• NEO — Near-Earth Object - Non-combatant Evacuation Operations
• BASIS — Burst and All-Sky Imaging Survey
• CRAF — Committee on Radio Astronomy Frequencies
• FIMS — Fors Instrumental Mask Simulator
• FFI — Full Frame Image
• NLDP — National Launch Development Program
• NIR — Near Infrared Research
• GKS — Graphic Kernel System
• LDE — Long Decay Event
• CMD — Color-Magnitude Diagram
• VISTAR — visible space tracking and reconnaissance
• SH — Super Hot
• EME — Earth-to-Moon-to-Earth
• SOHO — Solar Heliospheric Observatory
• OHD — Observational Hubble-parameter Data
• MOST — Molonglo Observatory Synthesis Telescope
• WBS — Wide Band Spectrometer
• SSS — SuperCOSMOS Sky Surveys

• PFR — Portable Foot Restraint
• HDF — Hubble Deep Field
• EMB — Earth Moon Barycenter
• MIPS — Multi-band Imaging Photometer
• EGP — Extrasolar Giant Planet
• ESIS — European Space Information System
• TRES — Transatlantic Exoplanet Survey
• OZ — Objective Zenith
• TSI — Total Solar Irradiance
• DRAO — Dominion Radio Astrophysical Observatory
• SCO — Software Change Order
• CP — Chemically Peculiar
• SRAA — Scenic Rim Astronomy Association, Inc.
• MUNICS — MUnich Near-Infrared Cluster Survey
• ♇ — Pluto
• SRC — Science Research Council (formerly DSIR) (U.K.)
• SUSI — Sydney University Stellar Interferometer
• NS — Neutron Star
• BIMA — Berkeley-Illinois-Maryland Array
• TPI — Technical Proposal Instructions
• EBL — Extragalactic Background Light
• WSF — Wake Shield Facility
• HESI — High Energy Solar Imager
• IFO — Identified Flying Object (see Also UFO)
• CIDA — Cometary Interplanetary Dust Analyzer
• WYBT — Whole Year Blazar Telescope
• CSMA — Committee on the Status of Minorities in Astronomy
• AOA — ASCA Online Arxiv
• UVOT — Ultraviolet Optical Telescope
• TR — TRansit
• VISTA — Visible and Infrared Survey Telescope for Astronomy
• TAA — Tasmanian Amateur Astronomers
• BS — Bica and Schmitt
• LLNL — Lawrence-Livermore National Laboratory
• CASA — Common Astronomy Software Applications
• ARAS — Astronomical Ring for Access to Spectroscopy
• EPOS — European Project on the Sun
• MTL — Mission Time Line
• UKSA — United Kingdom Space Agency
• HLC — Heavy Lift Capability
• LDN — Lynds Dark Nebulae
• GASA — Graduate Astronomy Students Association
• NA — Negative Alignment
• WAA — Washington Area Astronomers
• SXPHE — SX PhoEnicis
• EVGA — European VLBI Group for Geodesy and Astrometry
• AZA — Analiza Zanieczyszczenia Atmosfery
• LPICO — Lunar and Planetary Institute Contributions
• MACRO — Monopoles, Astrophysics, and Cosmic Ray Observatory
• UKIDSS UKIRT — Infrared Deep Sky Survey

• BE — Bright Elements
• LFSA — List of Frequently Seen Acronyms
• HS — horizontal system
• SSDA — Solar System Data Archive
• MBH — Massive Black Hole
• PBO — Pine Bluff Observatory
• EB — Eclipsing Beta
• SGRA — School of Galactic Radio Astronomy
• EPAO — Educational and Public Affairs Office
• MUF — Mysterious Unknown Force
• STAT — Space Telescope Astrometry Team
• EOT — End Of Tape
• DRD — Data Requirements Document
• SITB — System Integration and Testing Branch
• RS — Resource Scheduler
• MFP — magnetic field perturbation theory
• LTSA — Long-Term Space Astrophysics
• SZA — Sunyaev-Zeldovich Array
• LSB — Low Surface Brightness
• CMF — Core Mass Function
• LDS — Luyten Double Star
• TLP — Transient Lunar Phenomenon
• PSR — Pulsar
• CVP — Continuously Variable Planetary
• RCB — R Coronae Borealis
• MARS — MOUNTAIN ASTRONOMICAL RESEARCH SECTION
• GTC — Gran Telescopio Canario
• ADH — Average Daily Hours
• IRD — Interface Requirements Document
• SFAC — Santa Fe Astronomy Club
• RVMA — Reviews in Modern Astronomy
• ING — imagining new gastronomy
• LSVT — Large Solar Vacuum Telescope
• SG — Star Graph
• CBP — Collateral Benefits Plan
• STAN — Space Telescope Analysis Newsletter
• VLM — Very Low Mass
• CES — Central Electromagnetic Shower
• NESS — Near Earth Space Surveillance
• EOL — Earth Observing Laboratory (formerly ATD)
• EC — Embedded Cluster
• WFAU — Wide-Field Astronomy Unit
• ERO — Extremely Red Object
• CRSR — Center for Radiophysics and Space Research
• VBT — Vainu Bappu Telescope
• PZT — Photographic Zenith Tube
• SVAL — Soviet Astronomy Letters
• CAL — Casual Astronomy League
• PACS — Photoconductor Array Camera and Spectrometer
• M — Mira

• VOS — Virtual Operating System
• OGLE — Optical Gravitational Lensing Experiment
• PGC — Principal Galaxy Catalog
• ESTEC — European Space Research and Technology Center
• ARTEMIS — Advanced Relay TEchnology MISsion
• CGRO — Compton Telescope
• JAC — Japan Astronomical Circular
• CSF — Clustered Star Formation
• BRAS — Baton Rouge Astronomical Society
• NIR — Near Infrared Reflection
• CHZ — Circumstellar Habitable Zone
• ADOR — Astrometry and Design Operations Review
• MEV — million electron volts
• IRIS — InfraRed Imaging Surveyor
• COD — Carbon Oxygen Dwarf
• URPX — Uranian Ring Plane Crossing
• ARAS — Armenian Astronomical Society
• SLSN-R — radioactively powered SLSNe
• SSM — System Support Module
• O — Occult
• RSI — Research Systems, Inc.
• SHAD — Stellar Horizon Attitude Determination
• WCT — Window Correction Table
• HR — Hertzsprung-Russell
• R&R — Reproducibility And Repeatability
• WSO — World Space Observatory
• SCRT — Stockholm Centimetre Radio Telescope
• SDS — Star Diagnosis System
• UHTC — Ultra High Transmission Coatings (Meade)
• MXRB — Massive X-Ray Binary
• ACPG — Astronomical Community Participation Group
• REM — Rat Enclosure Module
• CAMC — Carlsberg Automatic Meridian Circle
• OPR — Operations Problem Report
• OT — Off-Topic
• WTTS — Weak-Line T-Tauri Star
• ALFA — A Laser For Astronomy
• DRO — Distant Retrograde Orbit
• SPWEA — Space Weather
• OAD — Office for Astronomy Development
• GRB(S) — gamma ray burst(s)
• OSG — Observatory Support Group
• WFPCII — Replacement For WFPC
• STARS — Seismic Telescope for Astrophysical Research from Space
• SDD — Single Dish Data
• STFS — Space Telescope Flight Software
• JOP — Joint Observing Program
• RAPT — Reynolds Amateur Photometry Team
• C&DH — Control and Data Handling
• VRAM — Virtual Random Access Memory

• CALL — Collaborative Asteroid Lightcurve Link
• ALIS — Airborne Laser Isotope Spectrometer
• ASCH — Alien Societies Culture And History
• WAPP — Wide-base Arecibo Pulsar Processor
• WBHF — WideBand High Frequency
• HRC — High Resolution Camera
• DCB — Design Change Board
• MLSO — Mauna Loa Solar Observatory
• EUSO — Extreme Universe Space Observatory
• IG — Inter-Galactic
• TBC — Time Base Correctors
• CRTS — Catalina Real-Time Transient Survey
• TIM — Telescope Image Modeling
• AB — Archive Branch
• VTT — Vacuum Tower Telescope
• VPO — VISTA Project Office
• RMO — Rattlesnake Mountain Observatory
• CGRO — Compton Gamma Ray Obsrvatory
• FIRST — Faint Images of the Radio Sky at Twenty-centimeters
• SET — Science, Engineering and Technology
• N — Nova
• STS — Shuttle Transport System
• CIO — Catalog of Infrared Observations
• LS — List Star
• SGC — Southern Galaxy Catalogue
• QHO — Quail Hollow Observatory
• LWS — Long Wavelength Spectrometer
• CSE — Circumstellar Envelope
• GRB — Gamma Ray Blast
• WHDF — William Herschel Deep Field
• YS — Yellow Straggler
• HRD — Hertzsprung-Russell Diagram (astronomy)
• ITT — International Telephone and Telegraph Corporation
• ASW — Address and Synchronization Word
• TLE — Total Lunar Eclipse
• MI — Maximum Influence
• GASP — GSSS Archive Support Project
• FU — Forces Unknown
• LAL — LALande
• RV — Radius of Venus
• NT — Non-Thermal
• YSG — Yellow Super Giant
• CVN — Canes Venatici (A constellation in the Northern Hemisphere near Ursa Major and Boötes, under the handle of the Big Dipper)
• INFOL — Ingredient Necessary FOr Life
• F — Fraunhofer lines
• SD — Subdwarf
• ISGRI — INTEGRAL Soft Gamma-Ray Imager
• LTT — Luyten Two-Tenths
• PASA — Pan-Arab Space Agency
• WLWG — Weak Lensing Working Group

• AA — Academic Affairs
• OTS — Oasa Tamura Sugitani
• TDT — Terrestrial Dynamical Time
• RDI — Radiation Driven Implosion
• SLS — Space Life Sciences
• TMN — Tokyo Meteor Network
• VSSC — Vikram Sarabhai Space Centre
• SIRA — Solar Imaging Radio Array
• SALT — South African Large Telescope
• MVAC — Mission Valley Astronomy Club
• KM — Kilometres
• NSUM — Non-Spatial Universal Mechanics
• TARDIS — The Apparatus for Really Distant Interstellar Sojourns
• SPST — Science Planning and Scheduling Team
• GN — Galactic Nebula
• L — Luyten
• SPS — Solar Power Satellite
• WHAC — West Hawaii Astronomy Club
• TRACE — Transition Region and Coronal Explorer
• MPAS — Mornington Peninsula Astronomical Society
• NLST — National Large Solar Telescope
• TAOS — Taiwan American Occultation Survey
• LMC — Large Magellanic Cloud
• PDB — Project Data Base
• RCI — Rodent Cage Interface
• DSO — Deep Space Object
• UVCS — Ultraviolet Coronal Spectrometer
• ABRIXAS — A BRoadband Imaging X-ray All-sky Survey
• AD — Analog to Digital
• O — Obli