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What does PROTO+PLANETARY+NEBULA Stand For?
For PROTO PLANETARY NEBULA we have found 3 definitions.
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What does PROTO+PLANETARY+NEBULA mean? We know 3 definitions for PROTO+PLANETARY+NEBULA abbreviation. Possible PROTO+PLANETARY+NEBULA meaning as an acronym, abbreviation, shorthand or slang term vary from category to category. Please look for them carefully.
PROTO+PLANETARY+NEBULA Stands For:
| Rank | Abbreviation | Meaning | |
|---|---|---|---|
| ***** | PPN | Proto-Planetary Nebula Astronomy Celestial object | |
| *** | PPNE | Proto-Planetary Nebulae | |
| ** | PPN | Proto Planetary Nebulae | |