单词 | celestial longitude |
释义 | celestial longitude (once / 1969886 pages) n WORD FAMILY celestial longitude: celestial longitudes USAGE EXAMPLESFor some reason astronomers have not, as we might expect, applied to these measurements the terms ‘celestial longitude’ and ‘celestial latitude.’ Grimm, Florence M., Astronomical Lore in Chaucer(2011) n (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 Syn|Hyper RA, right ascension angular distance the angular separation between two objects as perceived by an observer |
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