KnowraHour angleLinked fromLinked fromThe 12 pages that link to Hour angle, each with the reason it gives.All 12Related 9Compared with 3Right ascensionCompared with: Unlike right ascension, it changes as Earth rotates and depends on location and time.DeclinationRelated: Combined with declination, it helps determine an object's position relative to a local observer.Equatorial coordinate systemRelated: It relates right ascension to the object’s position in the observer’s sky.Sidereal timeRelated: Sidereal time gives the hour angle of an object when its right ascension is known.Solar timeRelated: The Sun’s hour angle provides a direct way to express local apparent solar time.Altitude (astronomy)Compared with: It tracks position relative to the meridian rather than height above the horizon.Spherical astronomyRelated: It links an object’s equatorial coordinates to its position relative to the local sky.Equatorial mountRelated: It describes the sky position that the mount’s hour-angle axis follows as time passes.GnomonRelated: A gnomon’s shadow direction tracks the Sun’s changing hour angle during the day.Celestial poleRelated: The poles anchor the coordinate system used to measure this angle.Horizontal coordinate systemCompared with: It tracks a time-dependent angle relative to the meridian, unlike azimuth around the horizon.Altazimuth mountRelated: Changing hour angle tracks a star's apparent westward motion, which an altazimuth mount splits across two axes.