hour angle

Found in Anh - Anh (Wordnet)

Definition Noun : (Astronomy) : The angular distance measured westward along the celestial equator from the observer's local meridian (the line from the north celestial pole through the zenith to the south celestial pole) to the hour circle of a specific celestial body. It indicates how much time has passed since the object crossed the meridian. (Astronomy) : A coordinate used in the equatorial...