Visual Online Solar System Simple yet informative online model of the solar system. I knew Jupiter had over 60 moons, but you don’t really visualize that until you see a model in action (seen above). The thing that really becomes clear is how many minor moons orbit WELL beyond the orbits of the major moons of the outer planets. It also provides models of some of the more well-known extrasolar planetary systems to the extent of bodies that we are currently aware of.