Moons

For earth's moon, see Moon

A moon is a smaller object orbiting a planet or dwarf planet.

Mercury and Venus don't have any moons, but maybe Venus has one in the past but the moon crashed into Venus. Earth has one moon, which is also spherical, the Moon. Mars has 2 moons that probably are asteroids captured from the asteroid belt, Phobos and Deimos. Both of them are irregular. Jupiter has 79 moons discovered, with 4 spherical ones. Saturn has 82 moons discovered, with 7 spherical ones. Uranus has 27 moons discovered, with 5 spherical ones. Neptune has 14 moons discovered, with Triton being the biggest one and the only spherical moon of neptune.