angle hoek 角度 galactic longitude l The angular distance on the celestial sphere measured clockwise from the galactic centre (as defined by the International Astronomical Union (IAU)) along the galactic equator to the intersection with the great circle drawn from the galactic north pole through the object. degree graad 度 minute (angle) minuut (hoek) 分钟（角） second (angle) seconde (hoek) 秒（角度）