"the Moon is falling towards Earth. However, it also has an orbital speed from the momentum gained during its formation that allows it to fall around Earth with a trajectory that follows the same curve as Earth's surface. Because these paths are parallel, the Moon perpetually falls around Earth without ever touching it." I know this. But when did moon gain this orbital speed in the first place? Hypothetically, if we disintegrate the moon and put an object with a same mass out of the blue where the moon was how that object would behave? Would it fall into world gradually leading a catastrophic collision due to the earth's gravity or would it orbit around the earth just like the moon?