NASA's Cassini spacecraft successfully completed its second-closest
encounter with Saturn's icy moon Helene on June 18, 2011, beaming down
raw images of the small moon. At closest approach, Cassini flew within
4,330 miles (6,968 kilometers) of Helene's surface. It was the
second closest approach to Helene of the entire mission. Image credit:
NASA/JPL-Caltech/Space Science Institute