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Dictionary

  Definition of right ascension
  1. an arc of the celestial equator eastward from the vernal equinox
  2. (astronomy) the angular distance eastward along the celestial equator from the vernal equinox to the intersection of the hour circle that passes through the body; expressed in hours and minutes and second; used with declination to specify positions on the
Similar Words: RA, celestial longitude

 

 
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