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Declination is the angular distance of a celestial body north (positive) or south (negative) of the celestial equator: the equivalent of latitude on Earth. The declination of the Sun is the angular position of the Sun at solar noon with respect to the plane of the equator.

Declination is one of two coordinates commonly used to define the position of an object in the sky, the other being right ascension. See also equatorial coordinates; magnetic declination.

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