Mars has two moons, Phobos and Deimos, named after the Greek god of war, Ares's twin sons
Phobos is the larger of Mars's two moons. It orbits Mars three times per day and is so close to its surface that it is not always visible from specific locations on Mars. Phobos is getting closer to Mars by six feet (1.8 meters) every hundred years. At that rate, it will collide with Mars or break into a ring in 50 million years.
Demios is the smaller of Mars' two moons. It revolves around Mars every 30 hours.