Figure 7-21 RIVUXG Jupiter’s Main Ring This Galileo image shows Jupiter’s main ring almost edge-on. The ring’s outer radius, about 80,000 mi (130,000 km) from the center of Jupiter, is close to the orbit of Adrastea, the second closest (after Metis) of Jupiter’s moons. Not shown is an even larger and more tenuous pair of “gossamer rings,” one of which extends out past 100,000 mi (160,000 km).