English

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Etymology

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Coined by William Herschel because of their apparent resemblance to the planet Uranus.

Pronunciation

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Noun

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planetary nebula (plural planetary nebulas or planetary nebulae)

  1. (astronomy) A nebulosity surrounding a dying red giant, consisting of material expelled by the star.

Synonyms

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  • PN (abbreviation)

Derived terms

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Translations

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See also

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