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Sidereal Year
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Sidereal year
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. It was equal to at noon 1 January 2000 (J2000.0). This is 20m24.5128s longer than the mean tropical year at J2000.0. The word "sidereal" is derived from the Latin sidus meaning "star".

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WordNet 2.0 DictionaryDownload this dictionary
sidereal year
Noun
1. the time for the earth to make one complete revolution around the sun, relative to the fixed stars
(hypernym) year


Rakefet DictionaryDownload this dictionary
Sidereal Year
Sidereal Year The time taken by the center of the sun's disc, departing eastward from the ecliptic meridian of a given star, to return to the same; being at present 365.2564 days. As a Hindu value gives 365.25868 and the Surya-Siddhanta gives 365.2587565 (SD 1:665), does this indicate a slow slackening of the earth's speed of rotation, thus lengthening the day?
Also used in The Secret Doctrine to mean the precessional year. See also EQUINOX 


English To Urdu LughatDownload this dictionary
sidereal year
Eng: sidereal year
Urdu: فلکی سال ۔ اس کا تعین ثابت سِتاروں کے حوالے سے کیا جاتا ہے اور اس سے وہ عرصہ مُراد ہے ۔
  

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