planetary nebula
English
Etymology
Coined by William Herschel because of their apparent resemblance to the planet Uranus.
Pronunciation
Audio (US) (file)
Noun
planetary nebula (plural planetary nebulas or planetary nebulae)
- (astronomy) A nebulosity surrounding a dying red giant, consisting of material expelled by the star.
Synonyms
- PN (abbreviation)
Derived terms
Translations
nebulosity
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See also
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