the time for the earth to make one complete revolution around the sun, relative to the fixed stars
A sidereal year is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. Hence it is also the time taken for the Sun to return to the same position with respect to the fixed stars after apparently travelling once around the ecliptic.
例句与用法
1.
The sidereal year is not used to construct a calendar . 恒星年不用于编制年历。
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