(moo -sess) (Hiten) A Japanese lunar probe launched in Jan. 1990 into an elongated 15-day Earth orbit. In Mar. 1990 it passed close to the Moon, and the small (30-cm) lunar probe swung into a lunar orbit using the Moon's gravity. The small lunar probe crashed onto the Moon in Apr. 1993.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006