| 单词 | right ascension |
| 释义 | right ascension (once / 48640 pages) n WORD FAMILY right ascension: right ascensions USAGE EXAMPLESA very large space 20′ or 30′ broad in Polar Distance, and 1m or 2m in Right Ascension, full of nebula and stars mixed. Gore, J. Ellard, Astronomical Curiosities—Facts and...(2012) One of the most interesting papers read was the report of the committee upon Professor Mitchel's system of observing Declinations and Right Ascensions. Various, Harper's New Monthly Magazine, Vol...(2012) The inner vernier is then set to the right ascension of the object which it is desired to observe. Keeler, James Edward, Photographs of Nebul? and Clusters...(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 one hour of right ascension equals fifteen degrees Syn|Hyper RA, celestial longitude angular distance the angular separation between two objects as perceived by an observer |
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