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planetary nebula

/ˈplænɪtəri ˈnɛbjʊlə/

翻译: 一种发射星云,由红巨星在生命晚期抛出的电离气体膨胀发光外壳组成,常呈现为太空中明亮的彩色环或圆盘。

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/ˈplænɪtəri ˈnɛbjʊlə/C1formalscientific
  • zh一种发射星云,由红巨星在生命晚期抛出的电离气体膨胀发光外壳组成,常呈现为太空中明亮的彩色环或圆盘。

A type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives, often appearing as a bright, colorful ring or disk in space.

  1. Astronomical objectC1formal

    A glowing shell of gas and plasma ejected by a dying star, often appearing as a bright, colorful ring or cloud in space.

    zh行星状星云

    • The Hubble Space Telescope captured stunning images of the Ring Nebula, a famous planetary nebula.
    • Planetary nebulae are formed when a star like our Sun runs out of fuel and sheds its outer layers.
    • Astronomers study planetary nebulae to understand the life cycle of stars.