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equinoctial line

/ˌiːkwɪˈnɒkʃəl laɪn/

翻译: 指天球赤道或地球赤道的旧称,即地球赤道平面与天球相交的大圆,或地球上与两极等距的纬线。

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phrase

/ˌiːkwɪˈnɒkʃəl laɪn/C2formalscientific已废弃
  • zh指天球赤道或地球赤道的旧称,即地球赤道平面与天球相交的大圆,或地球上与两极等距的纬线。

An archaic term for the celestial equator or the terrestrial equator, referring to the great circle where the plane of Earth's equator intersects the celestial sphere, or the line around Earth equidistant from the poles.

  1. Celestial EquatorC2formal

    The great circle on the celestial sphere that is directly above the Earth's equator, used in astronomy.

    zh天赤道

    • The equinoctial line is the projection of the Earth's equator onto the sky.
    • Stars near the equinoctial line rise and set in a predictable pattern.
    • Astronomers use the equinoctial line as a reference for celestial coordinates.