People such as doctors, dentists, veterinarians, lawyers, accountants, contractors, subcontractors, public stenographers, or auctioneers who are in an independent trade, business, or profession in which they offer their services to the general public are generally independent contractors.
Mars is the fourth planet from the sun. Mars has  two Moons, Phobos and Deimos. They were both discovered in 1877, by Asaph Hall at the Naval Observatory in Washington DC. Phobos is the larger one of Marsâ moons, and it orbits closer to the surface of Mars than Deimos does.
Most of the other planets in our solar system also have moons. The number of moons ranges from one for the Earth, to as many as 21 for Uranus. Two of our planets, Mercury and Venus, have no moons. Jupiter has 16 known moons, Saturn has 18, and Neptune has 8. Pluto has one moon, but this moon is so large in comparison that many astronomers consider the two objects to be a double planet rather than a planet and a moon. Moons also vary greatly in size.