Our Solar System
Moons of Mars
Mars has two moons, which are among the smallest in the solar system. They are made of carbon-rich rock mixed with ice. Scientists believe they could also be trapped asteroids
Phobos:
Only a bit larger than Deimos, this moon orbits closer to its planet than any other known moon (3,700 miles/ 6,000 kilometers). It is slowly spiraling toward Mars and is expected to either crash or break up and form a ring around the planet in about 50 million years. Phobox has a six-mile-wide (ten-kilometer-wide) crater,nearly half the width of moon itself
Phobos:
Only a bit larger than Deimos, this moon orbits closer to its planet than any other known moon (3,700 miles/ 6,000 kilometers). It is slowly spiraling toward Mars and is expected to either crash or break up and form a ring around the planet in about 50 million years. Phobox has a six-mile-wide (ten-kilometer-wide) crater,nearly half the width of moon itself
Moons of Mars
Deimos:The smaller of mar's moons, Deimos circles the red planet every 30 hours. Its surface is smoother than that of Phobos, probably because the majority of its craters are covered in dusty regolith of powdery soil created from earlier impacts
