Greywolfe: Cute. However, explaining retrograde moons, objects in elliptical orbits, etc may be a bit fun. And since the moon has that which we call gravity, why didn't space around it compress in a manner similar to Earth?
Also, after applying the dot-on-paper technique to about 1/3 of our solar system's objects, I wound up with a black hole in the center of my paper. It devoured my pencil and made me stop.