Last Updated
：2025/11/23
preplanetary nebula
（ plural ）
（ plural ）
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(astronomy) A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.
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preplanetary nebula
The research team used an infrared spectrometer to study a preplanetary nebula, revealing how the star begins to shed its outer layers before forming a true planetary nebula.
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The research team used an infrared spectrometer to study a preplanetary nebula, revealing how the star begins to shed its outer layers before forming a true planetary nebula.
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