Mars Facts

• Mars's moons Phobos and Deimos go around Mars the opposite way most other moons in the Solar System do.

• Phobos orbits Mars three times a day (Mars day), it is so far the only moon to be discovered that goes around a planet faster than that planet turns.

• You could launch yourself off Deimos by running, because the escape velocity is only 7 mph (11 km/hr).

• Phobos is only 6000 km off the surface of Mars, the closest moon to its planet in the Solar System.

• Mars has the biggest mountain in the Solar System (Olympus Mons). 

information site here