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object equator astronomy sky

Declination, in astronomy, one of two coordinates used to specify the position of an object in the sky under the equatorial coordinate system. Declination in the sky is roughly equivalent to latitude on earth. An object north of the celestial equator (an extension of the earth's equator) is said to have a positive declination, written with a plus sign. An object south of the celestial equator has a negative, or minus, declination.

See also: Astronomy.

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