The Moon is an astronomical body orbiting Earth and is the planet's only natural satellite. It is the fifth-largest satellite in the Solar System, and by far the largest among planetary satellites relative to the size of the planet that it orbits.br Surface gravity‎ : ‎1.622 ms² (0.165 4 g)br Surface pressure ‎: ‎2.25 × 10-12 torrbr Surface area‎ : ‎3.793 × 107 km² (0.