Sidereal time ("sidereal" pronounced / saɪˈdɪəriəl, sə -/ sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers. Using sidereal time and the celestial coordinate …

The meaning of SIDEREAL is of, relating to, or expressed in relation to stars or constellations : astral.

Jun 10, 2012 · 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.

Nov 30, 2024 · “The sidereal year is the time taken for the Earth to complete one revolution of its orbit, as measured against a fixed frame of reference (such as the fixed stars, Latin sidera, …

Should we really consider two corresponding sections of the same scale as exactly equal to one another: two sidereal days, for example, as exactly equal intervals of time?

Sidereal time, time as measured by the apparent motion about the Earth of the distant, so-called fixed, stars, as distinguished from solar time, which corresponds to the apparent motion of the …

Sidereal definition: determined by or from the stars.. See examples of SIDEREAL used in a sentence.

Sidereal refers to anything related to stars or constellations. More specifically, it is often used in the context of time measurement, where a sidereal day is the time it takes for the Earth to …

The sidereal period is the time it takes for a celestial body to complete one full orbit around another body, such as a planet around the sun or a moon around a planet. It is measured …

1. Of, relating to, or concerned with the stars or constellations; stellar. 2. Measured or determined by means of the apparent daily motion of the stars: sidereal time.