Two of Saturn's icy moons, Mimas and Tethys, circle the planet in this infrared image of the Ringed Planet taken by Cassini. Mimas is 397 kilometers (247 miles) across. Tethys is 1,071 kilometers (665 miles) across. It's also possible to see a large, doughnut-shaped storm near Saturn's southern pole which is at least 1,600 km (1,000 miles) across.