Celestial Horizon
Related Category: Astronomy: General
one axis of the altazimuth coordinate system.
celestial horizon
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An observer on the surface of the earth may be able to see points below his celestial horizon due to atmopsheric refraction.
The portion of her face she allows me to see
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Celestial Horizon - The circle on the celestial sphere which is 90 degrees from the zenith. The celestial horizon is approximately the boundary between the Earth and sky ...
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The point on the celestial horizon 90° clockwise from the north point. At the equinoxes the Sun rises in the east point.
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The horizon, celestial equator, ecliptic, and galactic systems of celestial coordinates are based on the celestial horizon, celestial equator, ecliptic, and galactic equator, respectively, as the primary great circle.
The term is customarily used only with reference to bodies whose centers are on the celestial horizon, and is prefixed E or W, as the body is rising or setting, respectively; and suffixed N or S to agree with the declination.
azimuth - The angle along the celestial horizon, measured eastward from the north point, to the intersection of the horizon with the vertical circle passing through an object.
(b) Angular distance from the north point eastward to the intersection of the celestial horizon with the vertical circle passing through the object and the zenith. [H76]
Azimuthal Quantum Number (k) ...
The Dip of the horizon at sea is the angular depression of the apparent sea horizon, or circle bounding the visible ocean, below the apparent celestial horizon as above defined.
 See also: Horizon, Astronomy, Celestial sphere, Earth, Azimuth
  
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