.The King of the Planets could not possess the best moons, but 4 of Jupiter's 95 moons are actually definitely the simplest to observe with a tiny set of field glasses or a little telescope because they form a crystal clear line. The Galilean Moons-- Ganymede, Callisto, Io, and also Europa-- were actually first uncovered in 1610 as well as they remain to blow away astrologers around the world.