Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun right_ascension

1 sense of right ascension

Sense 1
right ascension, RA, celestial longitude -- ((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; "one hour of right ascension equals fifteen degrees")
       => angular distance -- (the angular separation between two objects as perceived by an observer; "he recorded angular distances between the stars")