Waxing: The moon anytime before a full moon and after a new moon.Waning: the moon at any time after full moon and before new moon.Gibbous: convex at both edges, as the moon when more than half full.Crescent: a shape resembling a segment of a ring.
ICE ON MERCURY! The planet Mercury has a dark side that always faces away from the Sun. The exosphere is barely there; just stray molecules. There is enough ice on Mercury's dark side to cover Washington DC 300 feet deep!