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2. Sidereal time - Wikipedia

   en.wikipedia.org/wiki/Sidereal_time

   Although ERA is intended to replace sidereal time, there is a need to maintain definitions for sidereal time during the transition, and when working with older data and documents. Similarly to mean solar time, every location on Earth has its own local sidereal time (LST), depending on the longitude of the point.

3. Time standard - Wikipedia

   en.wikipedia.org/wiki/Time_standard

   A sidereal rotation is the time it takes the Earth to make one revolution with rotation to the stars, approximately 23 hours 56 minutes 4 seconds. A mean solar day is about 3 minutes 56 seconds longer than a mean sidereal day, or 1 ⁄ 366 more than a mean sidereal day. In astronomy, sidereal time is used to predict when a star will reach its ...

4. File:Local Sidereal Time.svg - Wikipedia

   en.wikipedia.org/wiki/File:Local_Sidereal_Time.svg

   Printable version; Page information ... A relationship between local sidereal time, hour angle and right ... geogebra.d.a Revision: 1.10 Source: Date: Thursday ...

5. Unit of time - Wikipedia

   en.wikipedia.org/wiki/Unit_of_time

   1.44 minutes, or 86.4 seconds. Also marketed as a ".beat" by the Swatch corporation. moment: 1/40 solar hour (90 s on average) Medieval unit of time used by astronomers to compute astronomical movements, length varies with the season. [4] Also colloquially refers to a brief period of time. centiday 0.01 d (1 % of a day) 14.4 minutes, or 864 ...

6. Equatorial coordinate system - Wikipedia

   en.wikipedia.org/wiki/Equatorial_coordinate_system

   As seen from above the Earth's north pole, a star's local hour angle (LHA) for an observer near New York. Also depicted are the star's right ascension and Greenwich hour angle (GHA), the local mean sidereal time (LMST) and Greenwich mean sidereal time (GMST). The symbol ♈︎ identifies the March equinox direction.

7. Hour angle - Wikipedia

   en.wikipedia.org/wiki/Hour_angle

   The local hour angle (LHA) of an object in the observer's sky is = or = + where LHA object is the local hour angle of the object, LST is the local sidereal time, is the object's right ascension, GST is Greenwich sidereal time and is the observer's longitude (positive east from the prime meridian). [3]

8. Sidereal Astrology Might Change The Way You Read Your Birth Chart

   www.aol.com/lifestyle/sidereal-astrology-might...

   The birth chart you have memorized is likely rooted in tropical astrology. But there's another system, too, called sidereal astrology. An astrologer explains.

9. Diurnal motion - Wikipedia

   en.wikipedia.org/wiki/Diurnal_motion

   up to one Sun or Moon diameter (about 0.5° or 30') every 2 minutes; up to one diameter of the planet Venus in inferior conjunction (about 1' or 60") about every 4 seconds; 2,000 diameters of the largest stars per second; Star trail and time-lapse photography capture diurnal motion blur. The apparent motion of stars near the celestial pole ...