the arc of the celestial equator measured eastward from the vernal equinox to the foot of the great circle passing through the celestial poles and a given point on the celestial sphere, expressed in degrees or hours.
Right ascension (abbreviated RA; symbol α) is the angular distance measured
eastward along the celestial equator from the vernal equinox to the hour circle of
Term: right ascension. The stars on the celestial sphere are like cities on the
globe. Cities are located on the globe using latitude and longitude. Longitude
Jul 20, 2006 ... Newcomers to astronomy can get thrown for a loop when they first encounter
declination and right ascension, the terms astronomers use to ...
Right ascension is analogous to longitude, is usually measured in units of time:
hours, minutes, seconds. The zero-point for right ascension is the Vernal ...
Jun 28, 2015 ... RA (right ascension) and DEC (declination) are to the sky what longitude and
latitude are to the surface of the Earth. RA corresponds to ...
Right Ascension and Declination are a system of coordinates used in astronomy
to determine the location of stars, planets and other objects in the night sky.
The second coordinate in the celestial equatorial system is right ascension. It is
analogous to (but not the same as) longitude. Much has Greenwich is the ...
Messier Object Data, sorted by Right Ascension. The old Charles Messier has
expressed his plan to bring out his catalog anew, ordered by right ascension; ...