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  1. sidereal year

    • n.
      the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 minutes longer than the solar or tropical year because of precession.
    • noun: sidereal year, plural noun: sidereal years

  2. 知識+

    • 怎麼跟外國人解釋農曆阿?

      ...year, this period (354.37 days) is sometimes referred to as lunar year, corresponding to thirteen sidereal months (355.18 days). Examples Most lunar...