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right ascension |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.06 sec. |
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right ascension, in astronomy, one of the coordinates in the equatorial coordinate system equatorial coordinate system, the most commonly used astronomical coordinate system for indicating the positions of stars or other celestial objects on the celestial sphere . The celestial sphere is an imaginary sphere with the observer at its center. ..... Click the link for more information. . The right ascension of a celestial body is the angular distance measured eastward from the vernal equinox along the celestial equator to its intersection with the body's hour circle hour circle, in astronomy, a secondary axis in the equatorial coordinate system . The hour circle of a celestial body is the great circle on the celestial sphere that passes through both the body and the north celestial pole. ..... Click the link for more information. . |
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| The right ascension of the ascending node, [OMEGA], is the angle from the vernal equinox to the ascending node of the satellite. The celestial coordinate system will allow students to chart objects in the sky using right ascension and declination, the equivalents of longitude and latitude on Earth. According tok it, this group is moving at about 550 kilometers per second toward a point at right ascension 10. |
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right ascension
