Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
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| Declination 1 Dec. |
One of the coordinates used to define position on the celestial sphere in the equatorial coordinate system. Declination is the equivalent of latitude on the Earth. It is the angular distance, measured in degrees, north or south of the celestial equator. Northerly declinations are positive and southerly ones negative.
See also: right ascension.
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