planetary nebula
English edit
Etymology edit
Coined by William Herschel because of their apparent resemblance to the planet Uranus.
Pronunciation edit
Audio (US) (file)
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