Calendars
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Local Apparent Sideral Time
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. The daily motion of this point provides a measure of the rotation of the Earth with respect to the stars, rather than the Sun. Local mean sidereal time is computed from the current Greenwich Mean Sideral Time plus an input offset in longitude ...
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Formulas and Constants