The Moon is associate astronomical body that orbits planet Earth being Earth's solely permanent natural satellite. it's the fifth-largest natural satellite within the system and also the largest among planetary satellites relative to the dimensions of the earth that it orbits its primary. Following Jupiter's satellite Io the Moon is second-densest satellite among those whose densities area unit The Moon is assumed to possess shaped concerning four.51 billion years past shortly once Earth. the foremost wide accepted rationalization is that the Moon shaped from the junk left over once an enormous impact between Earth and a Mars-sized body referred to as Theia.
The Moon is in synchronous rotation with Earth perpetually showing identical face with its close to aspect marked by dark volcanic maria that fill the areas between the brilliant ancient crustal highlands and also the outstanding impact craters. As seen from the planet it's the second-brightest frequently visible celestial object in Earth's sky once the Sun. Its surface is really dark though compared to the night sky it seems terribly bright with a coefficient simply slightly on top of that of worn asphalt. Its gravitative influence produces the ocean tides body tides and also the slight continuance of the day.
