There are actually many planets with four moons! Here are a few examples:

* Mars: Mars has two small moons, Phobos and Deimos.

* Jupiter: Jupiter has 79 known moons, with the four largest (Io, Europa, Ganymede, and Callisto) being the most famous.

* Saturn: Saturn has 82 known moons, with Titan being the largest.

* Uranus: Uranus has 27 known moons.

* Neptune: Neptune has 14 known moons.

Let me know if you'd like more information about any of these moons!