Right ascension is a term used in astronomy to describe the location of a celestial object in the sky along the east-west direction. It helps us figure out where something is located in the night sky.
Sentences with «right ascension»
For longitude's equivalent, a system of right ascension lines are inscribed on sky charts; these show what's on the meridian at hourly intervals. (discovermagazine.com)
NED identifies IC 4715 with M24, taking into account a possible position error of +10 minutes in Right Ascension. (maa.clell.de)
As luck would have it, the bright star Spica [Alpha (á) Virginis] has nearly the same right ascension as both NGC 5128 and Omega Centauri, so we can use it as a gauge for when both are at culmination. (cloudynights.com)