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equinoctial circle

/ˌiːkwɪˈnɒkʃəl ˈsɜːrkəl/

翻译: 天球赤道的旧称,指与地球赤道处于同一平面的天球大圆。历史上用于天文学和航海。

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/ˌiːkwɪˈnɒkʃəl ˈsɜːrkəl/C2formalscientific已废弃
  • zh天球赤道的旧称,指与地球赤道处于同一平面的天球大圆。历史上用于天文学和航海。

An archaic term for the celestial equator, the great circle of the celestial sphere that lies in the same plane as Earth's equator. It was historically used in astronomy and navigation.

  1. Celestial EquatorC2formal

    The great circle on the celestial sphere that lies directly above the Earth's equator, used as a reference for astronomical coordinates.

    zh天赤道

    • The equinoctial circle is the projection of the Earth's equator onto the sky.
    • Stars near the equinoctial circle rise and set in a predictable pattern.
    • Astronomers use the equinoctial circle to define the celestial coordinate system.