单词	right ascension
释义	right ascension noun : the arc of the celestial equator between the vernal equinox and the point where the hour circle through a given body intersects the equator reckoned eastward commonly in terms of the corresponding interval of sidereal time in hours, minutes, and seconds Example Sentences Recent Examples on the Web Declination and right ascension are the two primary axes of the celestial sphere. Reece Rogers, Wired, 19 Dec. 2021 Word History First Known Use 15th century, in the meaning defined above
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