What planets have no moons? Which have only one moon? Which has the greatest number of moons?
Mercury and Venus have no moons, Earth has one and Jupiter has the most.
The inner planets Mercury and Venus have no moons. Earth is the only planet with one moon.
Mars has two moons, though there is evidence that they are breaking up and in a few million years Mars will have no moons.
All of the outer planets have moons. Jupiter has the most with 67 moons. It's largest and first discovered moons are the Galilean moons, Io, Europa, Callisto and Ganymede. Some of the other, more recently discovered, moons don't yet have names.
Saturn is a close second with 62 moons, the largest being Titan.
Uranus has 27 moons and Neptune has 14.