The surface of Io is continually changing. Jupiter's moon is the home to many powerful volcanoes so active they are effectively turning the moon inside out. The sequence shows Io during a complete rotation, which corresponds to a complete revolution around Jupiter since Io always keeps the same face toward the giant planet. Io is composed mostly of rock, with the yellow color originating from sulfur . The causes of many of the other colors remain a topic of research .
Specific rights apply .