关于这张图
Saturn's moon Dione drifts before the planet's rings, seen here almost edge on. For all their immense width, the rings are relatively paper-thin, about 30 feet (10 meters) in most places. For its part, Dione is about 698 miles (1,123 kilometers) across. This natural-color view was obtained on Aug. 17, 2015 with Cassini's wide-angle camera at a distance of approximately 66,200 miles (106,500 kilometers) from Dione. The Cassini spacecraft ended its mission on Sept. 15, 2017 https://photojournal.jpl.nasa.gov/catalog/PIA17219
