The moon is said to have once been as big as Mars.
Plus, the Earth would NEVER function the same without the moon. There would be no light to guid us at night, no currents to send us on our way through the ocean, no tide to help us come in to the docks and take off. What I ment is that without the Shadow Ninjas, Warriors Creed wouldn't be the same. (It was just an analogy anyway, it could work the same with us being Earth and them the Sun.)