Definitions
sidereal year Tweet Definition of sidereal year Like Definition of sidereal year on Facebook
noun 
  1. The orbital period of the Earth; a measure of the time it takes for the Sun to return to the same position with respect to the stars of the celestial sphere. A sidereal year equals 365.25636042 mean solar days, or 20 minutes and 24 seconds longer than the tropical year.
Translations: 
  • French: (t, fr, année sidérale, f)
    (trans-mid)
    (trans-bottom)

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