This older Cassini photo (above) was taken on the closest-ever flyby of the moon and gives a beautiful look at the Herschel crater, which spans 80 miles and is the reason for the "Death Star" moniker. The image is a composite of six images Cassini took on Feb. 13, 2010, at a distance of 5,900 miles.
The Cassini spacecraft is a cooperative project between NASA, the European Space Agency (ESA), and the Italian Space Agency. It has been studying Saturn and its moons since 2004. Now, it's approaching the end of its lengthy mission and will do a death dive into the planet next fall after it travels between the planet and its rings, the first time a spacecraft has ever made that trek.