The Moon is the only natural satellite of Earth : orbit : 384,400 km from Earth diameter : 3476 km mass : 7.35e22 kg . ... The New Solar System . ... Very high quality reproductions of Apollo images of the Moon. ... As the Moon orbits around the Earth once per month, the angle between the Earth, the Moon and the Sun changes; we see this as the cycle of the Moon's phases. ... The Moon's gravitational attraction is stronger on the side of the Earth nearest to the Moon and weaker on the opposite side. ...