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Download as PDF; Printable version; In other projects ... mean sidereal time if the mean equator and ... National Institute of Standards and Technology. 12 May 2010 ...
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English: Earth physically rotates in 23hours 56min relative to distant stars – a Sidereal Day, BUT it takes 24hours to rotate relative to the Sun – a Solar Day The difference? Earth orbits the Sun, so the Sun appears to move (down, in the vid), which means Earth needs +4mins to catch up!
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Anti-sidereal time has about 364.25 days per year, one day less than the number of days in a year of solar time, 365.25. Thus each anti-sidereal day is longer than a solar day (24 hr) by about four minutes or 24 hr 4 min. Extended-sidereal time has about 367.25 days per year, one day more than the number of days in a year of sidereal time, 366. ...
Sidereal, meaning "of the stars", may refer to: Sidereal time; Sidereal day; Sidereal month; Sidereal year; Sidereal period of an object orbiting another astronomical object; Sidereal and tropical astrology
The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", [2] due to the precession of the equinoxes. The sidereal year is 20 min 24.5 s longer than the mean tropical year at J2000.0 (365.242 190 402 ephemeris days) .
The following other wikis use this file: Usage on en.wikibooks.org Planet Earth/1e. Earth’s Motion and Spin; Planet Earth/print version; Usage on ig.wikipedia.org Oge ihu igwe; Usage on it.wikipedia.org Tempo siderale; Usage on zh-yue.wikipedia.org 恆星時