.The King of the Planets may not have the most moons, yet 4 of Jupiter's 95 moons are actually certainly the simplest to see with a small set of field glasses or a little telescope since they develop a clear line. The Galilean Moons-- Ganymede, Callisto, Io, and Europa-- were 1st found in 1610 and they remain to astound stargazers around the world.