The Moon revolves around the Earth with an orbital period of 27.321 days. However, the synodic period, which is the period it takes for the phase relationship between the Earth, Moon, and Sun to repeat, is 29.531 days.
The earth and moon both revolve around their common center of mass. Since the mass of the earth is about 82 times the mass of the moon, the moon is about 82 times as far from the common center of...
The Moon is in synchronous rotation with the Earth, which means it rotates on its axis in exactly the same time it takes to orbit the Earth, so one side permanently faces the Earth and the other side...