http://www.caterina.net/archive/000839.html There are several theories concerning the origin of the moon. One theory proposes that the moon was formed byh accretion... en-us http://spaces.msn.com/members/MoooonRiver/blog/cns!1pddymn7pnQ9w-QSot8Fm4Zw!1506.entry Mare Imbrium