Mars has two very small satellites orbiting it, Phobos and Deimos. Scientists believe that both moons are actually asteroids captured via Mars's gravitational field. Made of dark rock that includes a great deal of carbon, both satellites have many craters due to collisions with debris.Know More
Phobos, with a 13-mile radius, is the larger of the two moons, and it is 5,830 miles from Mars. It circles Mars three times per day. Deimos has a radius of eight miles, and it is 14,580 miles from Mars. It circles Mars once very 30 hours.
Asaph Hall discovered both moons in 1877. He named them after the sons of the Greek god Ares whose Roman counterpart is Mars.Learn more about Planets
The dwarf planet Pluto has five satellites or moons. Their names are Nix, Styx, Hydra, Kerberos and Charon. Pluto's largest moon is Charon, which was discovered in 1978. Pluto is about a half size larger than Charon.Full Answer >
The planet Neptune has 13 satellites, or moons. The largest is Triton, which was discovered by amateur astronomer William Lassell on October 10, 1846, just 17 days after German astronomers discovered Neptune, according to NASA.Full Answer >
The planet Mercury does not have any known moons (natural satellites) as of 2014. There has been one known artificial satellite orbiting Mercury, known as Messenger.Full Answer >
Saturn has 53 natural satellites, also known as moons, as of 2014. It has nine provisional moons, defined as moons whose discovery is awaiting confirmation by the International Astronomical Union.Full Answer >