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Planetary nebula   /plˈænətˌɛri nˈɛbjələ/   Listen
Planetary nebula

noun
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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Words linked to "Planetary nebula" :   nebula



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