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 …

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

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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 · Simply put, a sidereal year – it’s pronounced sy- dear -ee-al, by the way, despite being spelled side-real – is the amount of time it takes for the planet to orbit the Sun once with respect...

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

Find 21 different ways to say SIDEREAL, along with antonyms, related words, and example sentences at Thesaurus.com.

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.

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 Sun.

Sidereal time increases by about 24h 03m 57s in each solar (civil) day. A given star crosses the meridian at the same sidereal time each day (assuming its proper motion is negligible), but 3m...