Wiktionary

planetary nebula nucleus

English

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Etymology

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planetary nebula +‎ nucleus

Noun

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planetary nebula nucleus (plural planetary nebula nuclei)

  1. (astronomy) The remnant hot luminous core of the stellar progenitor of the planetary nebula, which ionizes the surrounding planetary nebula.

Synonyms

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  • PNN (abbreviation)

Derived terms

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  • PNN (abbreviation)
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