Last Updated
：2025/12/05
planetary nebula nucleus
（ plural ）
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(astronomy) The remnant hot luminous core of the stellar progenitor of the planetary nebula, which ionizes the surrounding planetary nebula.
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planetary nebula nucleus
The extremely hot planetary nebula nucleus at the center emits intense ultraviolet radiation that ionizes the surrounding gas and causes the nebula to glow.
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The extremely hot planetary nebula nucleus at the center emits intense ultraviolet radiation that ionizes the surrounding gas and causes the nebula to glow.
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