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单词 sidereal time
释义

WordReference Random House Unabridged Dictionary of American English © 2024
sidereal time, [Astron.]
  1. Astronomytime measured by the diurnal motion of stars. A sidereal day is about four minutes shorter than a solar day, with hours, minutes, and seconds all proportionally shorter.
  • 1805–15

Collins Concise English Dictionary © HarperCollins Publishers::
sidereal time n
  1. time based upon the rotation of the earth with respect to the distant stars, the sidereal day being the unit of measurement
    See also sidereal day
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