Mercury and Venus have no moons. Earth, of course, has just one moon, Luna. Mars has two moons, Phobos and Deimos. Jupiter has a total of 67 moons, including the famous “Galilean moons” Io, Europa, Ganymede, and Callisto; Saturn has 62, of which Titan is the most massive and the most famous; Uranus has 27, all named after Shakespeare and Alexander Pope characters; and Neptune has 14, of which Triton is the most massive. Pluto, which is considered a dwarf planet, has five moons.