Right-ascension meaning

The angular distance of a celestial body or point on the celestial sphere, measured eastward from the vernal equinox along the celestial equator to the hour circle of the body or point and expressed in degrees or hours.
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The angular distance of the hour circle of a celestial body from the vernal equinox, measured eastward along the celestial equator and expressed in degrees (from 0 to 360) or, more commonly, in hours (from 0 to 24), minutes, and seconds: it is used with declination to find an exact position in the sky: abbrev. RA.
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The position of a celestial object east of the vernal equinox along the celestial equator . Right ascension is measured in hours, minutes, and seconds from the vernal equinox (0 hours) to the point where a great circle drawn through the object and the north and south celestial poles intersects the celestial equator. Each hour corresponds to 15° of angular distance along the celestial equator for a total of 24 hours.
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(astronomy) The angular distance east of the vernal equinox point; the celestial equivalent of longitude.
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