Wiktionary

planetary nebula nucleus

English edit

Etymology edit

planetary nebula +‎ nucleus

Noun edit

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 edit

  • PNN (abbreviation)

Derived terms edit

  • PNN (abbreviation)
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