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Right ascension   /raɪt əsˈɛnʃən/   Listen
Right ascension

(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.  Synonyms: celestial longitude, RA.

WordNet 3.0 © 2010 Princeton University

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"Right ascension" Quotes from Famous Books

... mark the summit and the foot of the Cross having nearly the same right ascension, it follows that the constellation is almost perpendicular at the moment when it passes the meridian. This circumstance is known to the people of every nation situated beyond the tropics, or in the ...
— Equinoctial Regions of America • Alexander von Humboldt

Words linked to "Right ascension" :   celestial longitude, uranology, ra, angular distance, astronomy

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