Phobos News

Phobos is one of the two small moons orbiting Mars, the other being Deimos. Discovered by American astronomer Asaph Hall in 1877, Phobos is the larger and closer of the two moons, with an average radius of about 11 kilometers (7 miles). It orbits Mars at a distance of approximately 6,000 kilometers (3,700 miles), making it one of the closest moons to its planet in the solar system. Phobos is irregularly shaped and heavily cratered, with a surface covered in dust and loose rocks. Its most prominent feature is the large impact crater named Stickney, which spans about 9 kilometers (5.6 miles) in diameter. Due to its proximity to Mars, Phobos orbits the planet in just under 8 hours, causing it to rise and set twice each Martian day. Scientists believe Phobos may be a captured asteroid or a remnant from a larger body that was destroyed. Its eventual fate is to either crash into Mars or break apart and form a ring around the planet due to tidal forces.