planetary nebula
Appearance
English
[edit]Etymology
[edit]Coined by William Herschel because of their apparent resemblance to the planet Uranus.
Pronunciation
[edit]Noun
[edit]planetary 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
[edit]Translations
[edit]nebulosity