noun
horizontal coordinates
Technical term in astronomy; refers to the coordinate system based on the observer's local horizon, using altitude and azimuth.
天体の位置を地平座標で表す。
Express the position of a celestial body in horizontal coordinates.
Equatorial coordinates, based on the celestial equator, unlike the observer-dependent horizontal coordinates.
Compound of 地平 (horizon) and 座標 (coordinates).