A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from Viewpoint A, the object appears to be in front of the blue square. When the viewpoint is changed to Viewpoint B, the object appears to have moved in front of the red square.
From top to bottom: Io, Europa, Ganymede, Callisto. The Galilean moons are the four largest moons of JupiterâIo, Europa, Ganymede, and Callisto. They were discovered by Galileo Galilei around January 1610 and were the first group of objects found to orbit another planet. Their names derive from the lovers of Zeus.
Jupiter has 63 known moons, and more are discovered with every space probe we send there. It is likely that there are more not yet identified. The most recent are extremely sm â¦ all.As with the icy moonlets in Saturn's rings, there are millions of small objects orbiting the planet, some as part of Jupiter's own rings.upiter has 63 moons discovered to date. Some names of Jupiter's moon are Io, Europa, Ganymede, Callisto and many more.