planetary nebula


Definition: Meaning of, planetary nebula in English to English dictionary.

Pronunciation: / ˈplanɪt(ə)ri ˈnɛbjʊlə /

  • noun
  • synonym
  • antonym
Word Forms:
Singular Plural
planetary nebula planetary nebulae
  1. a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star
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