Ganymede is the one known moon with its personal magnetic field, which brings about auroras akin to These on Earth. The auroras sway when Jupiter’s magnetic area fluctuates, partial proof for a sizable saltwater ocean. Big-affect hypothesis. In Wikipedia. By NASA/JPL-Caltech, Community Area, Wikipedia Moons form by many different procedures, https://bestmoons83714.blogtov.com/15208684/not-known-factual-statements-about-moons