3 artificial satellites presently orbit Mars.
Citation:
http://www.nytimes.com/2006/03/11/science/11plane.html
10 satellites. Only 2, Phobos and Diemos
3, Charon, Nix and Hydra.
Two: Phobos and Deimos. Both are tiny asteroid-like bodies. two
We have used artificial satellites in order to take pictures and study the moon and they did travel around it.
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