sidereal day

Noun

Meaning

the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day

Source: WordNet

Synonyms

day light bright daytime daylight sunlight sunshine mean solar day sidereal time sidereal year days sidereal month brights light of day astronomical day
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Antonyms

twilight black eventide night dark shadow
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Hypernyms

sidereal time time unit unit of time

Examples

Astronomy and Astrophysics 105(2), 361, 1982, see equation 19. defined UT1 such that the observed sidereal day at the beginning of 2000 would be times a UT1 day of main s, which gives main s of UT1. Source: Internet

Because its rotation is so slow, Venus is very close to spherical. citation A Venusian sidereal day thus lasts longer than a Venusian year (243 versus 224.7 Earth days). Source: Internet

A mean solar day is, therefore, nearly 4 minutes longer than a sidereal day. Source: Internet

A semi-synchronous orbit has an orbital period of ½ sidereal day, i.e., 11 h 58 min. Source: Internet

A sidereal day (the period of rotation) lasts about 58.7 Earth days. Source: Internet

Earth's sidereal day also differs from its rotation period relative to the background stars by the amount of precession in right ascension during one day (8.4 ms). Source: Internet

Close letter words and terms

sidereal sidereal astrology sidereal clock sidereal days sidereal hour sidereal hour angle