Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: right angle
Next word: right away
Definition of: right ascension
Astron.
The angular distance of a celestial body from the vernal equinox, measured eastward along the celestial equator in hours, minutes, and seconds from 0 hours to 24 hours.
Comment about this word, ask questions, or add new information about this topic: