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 Definitions of planetary nebula  [ˈplæn ɪˌtɛr i]  

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Definition of 'planetary nebula' Random House Webster's College Dictionary 

1. (n.) planetary nebula
an expanding shell of thin ionized gas that is ejected from and surrounds a hot, dying star.

Etymology:  (1775–85)

Definition of 'planetary nebula' Princeton's WordNet 

1. (noun) planetary nebula
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

'planetary nebula' - Nearby Entries  

planet gear  planetary  planetary gear  planetary house  planetary nebula  planetesimal  planetesimal hypothesis  



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