.IO is the innermost of the four Galilean moons of jupiter and , with a diameter of 3642 kilometers, the fourth largest moon in the solar system .                                        IO                     True-color image taken by the Galileo probe.                  

                                                                     laplace resonance

model of possible composition of io

                                                            mosaic of voyage 1

                                                                                                                                              

                                                                                                                

schematie of jupiters magnetospere