The big bang started the earth, which is the explosion of a Supernova, pushing its conetents together to create the sun. The sun spun on a disk, and parts of the disk began to break off in grain-size peices, then growing and growing and pushing together and forming miniature planets. Then, the sun began to heat up and it threw enough rocks and boulders to create a stable planet. Some of the rock began to come off Earth's surface to create the Moon.