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(noun) an arc of the celestial equator eastward from the vernal equinox |
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Related Words: celestial equator, equinoctial, equinoctial circle, equinoctial line |
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| 2. |
(noun) (astronomy) the angular distance eastward along the celestial equator from the vernal equinox to the intersection of the hour circle that passes through the body; expressed in hours and minutes and second; used with declination to specify positions on the celestial sphere; "one hour of right ascension equals fifteen degrees" |
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Synonyms: RA, celestial longitude |
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Related Words: angular distance |
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