planetary nebula
English
editEtymology
editCoined by William Herschel because of their apparent resemblance to the planet Uranus.
Pronunciation
editNoun
editplanetary nebula (plural planetary nebulas or planetary nebulae)
- (astronomy) A nebulosity surrounding a dying red giant, consisting of material expelled by the star.
Synonyms
edit- PN (abbreviation)
Derived terms
editTranslations
editnebulosity