English dictionary



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English noun: celestial longitude

1. celestial longitude (location) (astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere


SamplesOne hour of right ascension equals fifteen degrees.


SynonymsRA, right ascension


Broader (hypernym)angular distance


Domain categoryastronomy, uranology









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