Board Thread:Theories and Speculation/@comment-25302335-20150914182027/@comment-6769189-20150916023643

They use 6 Paths Chibaku Tensei and create the moon. Hagoromo decided he needs it, he summons it back down, seals it within himself. Hamura goes to the moon to prepare everything on the moon so that his people can watch over it. Hagoromo sends/Hamura summons back the Gedo when Hagoromo decided to split the chakra.