1. hour angleAstronomy
2. Hour angleIn astronomy and celestial navigation, the hour angle is one of the coordinates used in the equatorial coordinate system to give the direction of a point on the celestial sphere. The hour angle of a point is the angle between two planes: one containing the Earth's axis and the zenith, and the other containing the Earth's axis and the given point (the hour circle passing through the point).
Read “Hour angle” on English Wikipedia
Read “時角” on Japanese Wikipedia
Read “Hour angle” on DBpedia
Read “Hour angle” on English Wikipedia
Read “時角” on Japanese Wikipedia
Read “Hour angle” on DBpedia
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