Celestial Meridian
The celestial meridian is the line on the celestial sphere joining the observer's zenith (i.e. the point directly overhead) with the north and south celestial poles.
Celestial Meridian
Related Category: Astronomy: General
vertical circle passing through the north celestial pole and an observer's zenith. It is an axis in the altazimuth coordinate system.
celestial meridian
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Celestial Meridian
The great circle on the celestial sphere which passes through the celestial poles and the zenith of the observer.
Celestial Poles ...
celestial meridian (NASA SP-7, 1965) A great circle of the celestial sphere, through the celestial poles and the zenith.
Technically, the sidereal time is defined as the length of time since the vernal equinox has crossed the local celestial meridian.
These points are the intersections of the celestial meridian (N, S) and the prime vertical (E, W) with the horizon.
Study of the movements and physical interactions of objects in space; astrophysical mathematics. [A84]
Celestial Meridian ...
Astronomical longitude is the angle between the plane of the reference meridian and the plane of the celestial meridian.
 See also: Meridian, Earth, Astronomy, Atmosphere, Distance
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