Mars has two small moons that are illustrated in the following figures, Phobos and Deimos.
Mars has two natural satellites, discovered by Asaph Hall in 1877. The innermost of these, Phobos, is about 7 mi (11 km) in diameter and orbits the planet with a period far less than Mars's period of rotation (7 hr 39 min), causing it to rise in the west and set in the east. The outer satellite, Deimos, is about 4 mi (6 km) in diameter.
These are examples of minor satellites:small chunks of rock in orbit around planets as compared with large satellites like the Earth's Moon.
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Last Modified : 5 Sep. 2001
Created By#C0115361 Team