The moons of Mars are very different than the moon Earth has. Mars moons are very irregular in shape. Phobos is 27 km long in its longest dimensions and Deimos is 15 km long in its longest dimensions.American astronomer Asaph Hall Sr. Indemnified the Moons after a long search, although their existence had been speculated before. The moons of Mars were officially founded in 1877.Both the Moons crater and orbit the planet in rather low orbits Phobos is only about 3,000 miles above the Martian surface and orbits in a little over 7 hours.(thus it makes more than 3 orbits in a single Martian day.) Deimos is a little farther out and orbits in about 30 hours. These moons of Mars were not formed the same way as the Moon of Earth. They are Probably fragments of larger objects broken apart in a collision.