Jupiter's moon Ganymede is the biggest moon inside the photo voltaic system. It can be bigger than planet Mercury and dwarf Earth Pluto, and It can be about a few-quarters the scale of Mars. It's also the only moon recognised to obtain its have magnetic subject. Giant-impression hypothesis. In Wikipedia. https://bestmoons83714.win-blog.com/15328941/5-easy-facts-about-best-moons-described