High Quality Content by WIKIPEDIA articles! Origin of the Moon is explanations for the formation of the Moon, Earth`s natural satellite. The leading theory has been the giant impact hypothesis. However, research continues on this matter, and there a number of variations and alternatives. Captured body, fission, formed together (condensation theory), planetesimal collisions (formed from asteroid-like bodies), and collision theories are some other ones. However, most of these have a lot of problems which is one reason why giant impact hypothesis has been favored.