right ascension


Definition of right ascension

  1. :  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

15th Century

First Known Use of right ascension

15th century

Learn More about right ascension

Seen and Heard

What made you want to look up right ascension? Please tell us where you read or heard it (including the quote, if possible).


to criticize severely

Get Word of the Day daily email!