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Right ascension
RIGHT ASCENSION

Definition: (astronomy) The angular distance eastwards along the celestial equator (or equinoctial) between the first point of Aries and the point where the circle of declination of a heavenly body cuts the equinoctial. It is one of the two data which determine position in the celestial sphere, corresponding with terrestrial longitude.
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See perfect declination (2).
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See perfect declination (3).

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