What does PPNe stand for?
PPNe stands for "Proto-Planetary Nebulae"
How to abbreviate "Proto-Planetary Nebulae"?
"Proto-Planetary Nebulae" can be abbreviated as PPNe
What is the meaning of PPNe abbreviation?
The meaning of PPNe abbreviation is "Proto-Planetary Nebulae"
What does PPNe mean?
PPNe as abbreviation means "Proto-Planetary Nebulae"
