Sidereal time is a measure of the position of the Earth in its rotation around its axis, or time measured by the apparent diurnal motion of the vernal equinox, which is very close to, but not identical to, the motion of stars.
http://en.wikipedia.org/wiki/Sidereal_time
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Compute Local Apparent Sidereal Time ... Sidereal time is the hour angle of the vernal equinox, the ascending node of the ecliptic on the celestial equator. ... Astronomers use local sidereal time because it corresponds to the coordinate right ascension of a celestial body that is presently on the local meridian.
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tycho.usno.navy.mil/sidereal.html
tycho.usno.navy.mil/sidereal.html
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A solar day is exactly 24 hours (of solar time). Because of the Earth's revolution, a solar day is slightly longer than a sidereal day. In every day life, we use solar time. ... Sidereal time is time kept with respect to the distant stars.
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www.astro.cornell.edu/academics/courses/astro2201/sider...
www.astro.cornell.edu/academics/courses/astro2201/sidereal.htm
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sidereal time (ST), time measured relative to the fixed stars; thus, the sidereal day is the period during which the earth completes one rotation on its axis so that some chosen star appears twice on the observer's celestial meridian .
http://qanda.encyclopedia.com/question/sidereal-time-12...
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Sidereal Time literally means “star time”. The time we are used to using in our everyday lives is Solar Time. The fundamental unit of Solar Time is a Day: the time it takes the Sun to travel 360 degrees around the sky, due to the rotation of the Earth.
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docs.kde.org/en/3.1/kdeedu/kstars/ai-sidereal.html
docs.kde.org/en/3.1/kdeedu/kstars/ai-sidereal.html
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The sidereal time is measured by the rotation of the Earth, with respect to the stars (rather than relative to the Sun). Local sidereal time is the right ascension (RA, an equatorial coordinate) of a star on the observers meridian.
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www.jgiesen.de/astro/astroJS/siderealClock/
www.jgiesen.de/astro/astroJS/siderealClock/
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Problem: Let the vernal equinox occur at noon solar time on March 21 of a certain year. Estimate the sidereal time at 3:00 pm solar time on November 29 of the same year.
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www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_Thi...
www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_Thinking/telling_time_by_the_stars.htm
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A sidereal clock is designed to complete 24 hours of sidereal time in 23h 56m 04s of civil (solar) time. As such a clock runs at the same rate as the Earth's rotation it can be used directly to specify precisely how much the Earth has rotated.
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www.dur.ac.uk/john.lucey/users/lst.html
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Sidereal Time and Solar Time ... Technically, the sidereal time is defined as the length of time since the vernal equinox has crossed the local celestial meridian. An equivalent definition of the sidereal time is the right ascension of any star presently located on the local celestial meridian.
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csep10.phys.utk.edu/astr161/lect/time/timekeeping.html
csep10.phys.utk.edu/astr161/lect/time/timekeeping.html
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