SpaceYoung Saturn gave Jupiter the building blocks for its big moons After Jupiter formed, it likely had no nearby material to build moons. Young Saturn may have tossed rocks at the gas giant that grew into its four biggest moons 51¶¯Âþ
SpaceThe moon may have formed in a vaporised, doughnut-shaped Earth Early Earth may have been smashed into a vapour by a Mars-sized object. Our moon may have formed at the edges of the leftover doughnut-shaped cloud of debris 51¶¯Âþ