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  1. sidereal

    • IPA[ˌsīˈdirēəl]

    美式

    • adj.
      of or with respect to the distant stars (i.e. the constellations or fixed stars, not the sun or planets).
    • 相關詞
    • n.
      a clock measuring sidereal time in terms of 24 equal divisions of a sidereal day.

    Oxford American Dictionary

    • n.
      the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 ...

    Oxford American Dictionary

    • n.
      the time between two consecutive transits of the First Point of Aries. It represents the time ...

    Oxford Dictionary

    • n.
      time reckoned from the motion of the earth (or a planet) relative to the distant stars (rather ...

    Oxford Dictionary

    • n.
      the period of revolution of one body about another with respect to the distant stars.

    Oxford Dictionary

    • n.
      the period of revolution of one body around another with respect to the distant stars.

    Oxford American Dictionary

    • n.
      the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 ...

    Oxford Dictionary

    • n.
      the time it takes the moon to orbit once around the earth with respect to the stars ...

    Oxford American Dictionary

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    • IPA[sʌɪˈdɪərɪəl]

    英式

    • adj.
      of or with respect to the distant stars (i.e. the constellations or fixed stars, not the sun or ...

    Oxford Dictionary

  2. 知識+

    • 怎麼跟外國人解釋農曆阿?

      ... sometimes referred to as lunar year, corresponding to thirteen sidereal months (355.18 days). Examples Most lunar...

    • 英文翻譯 星體運動相關

      此段在闡述「恆星時」的定義,也就是說,同一顆恆星相鄰兩次過中天的時間是一「恆星日」。 ※ 赤經在子午線上也就是「中天」的意思