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Sidereal time - Wikipedia Both solar time and sidereal time make use of the regularity of Earth's rotation about its polar axis: solar time is reckoned according to the position of the Sun in the sky while sidereal time is based approximately on the position of the fixed stars on the theoretical celestial sphere
Michael’s Miscellany: Sidereal Time - Astronomy Magazine Sidereal time, unlike solar time (everyday clock time), is referenced to the stars and is defined as the right ascension of the celestial object on the local meridian Sidereal time varies with
Sidereal time: What is it? - EarthSky Sidereal time measures the rotation of our planet relative to the stars It allows astronomers to keep time without worrying about the motion of Earth around the sun
Sidereal vs. Solar Time: What’s the Difference? Sidereal time tracks Earth's rotation relative to stars, while solar time follows the sun The difference? A sidereal day is about 4 minutes shorter