Saturn's moon Mimas is dominated by a huge, unmistakable crater called Herschel that makes the moon look like the Death Star in the movie "Star Wars." On Feb. 13, 2010, NASA's Cassini spacecraft made closest-ever flyby of Mimas, returning this photo and others in spectacular flyby. Mimas is 246 miles (396 kilometers) across.
This figure illustrates the unexpected and bizarre Pac-Man like pattern of daytime temperatures found on Saturn's small inner moon Mimas. The heat map was compiled from data recorded by the Cassini spacecraft during a Feb. 13, 2010 flyby of Mimas.
This mosaic, created from images taken by NASA's Cassini spacecraft during its closest flyby of Saturn's moon Mimas on Feb. 13, 2010, looks straight at the moon's Herschel crater and reveals new insights about the moon's surface. Herschel crater gives Mimas its "Death Star" appearance. It is about 80 miles (130 kilometers) wide.
This false-color view of Saturn's moon Mimas from NASA's Cassini spacecraft highlights terrain-dependent color differences and shows dark streaks running down the sides of some of the craters on the region of the moon that leads in its orbit around Saturn. The origin of the color differences (exaggerated by computer enhancement) is not yet understood.
Relatively dark regions below bright crater walls and streaks on some of the walls are seen in this mosaic of Saturn's moon Mimas, created from images taken by NASA's Cassini spacecraft during its closest flyby of the moon on Feb. 13, 2010
Subtle color differences on Saturn's moon Mimas are apparent in this false-color view of Herschel Crater captured by NASA's Cassini spacecraft during its closest-ever flyby of that moon on Feb. 13, 2010. The crater is 80 miles (130 kilometers) wide.
NASA's Cassini spacecraft captured a three-dimensional view of the large Herschel Crater on Saturn's moon Mimas during its closest-ever flyby of the moon on Feb.13, 2011. The crater is 80 miles (130 kilometers) wide.
Appearing like a cyclops gazing off into space, Saturn's moon Mimas and its large Herschel Crater are profiled in this view from NASA's Cassini spacecraft taken on Feb. 13, 2010.
The shadow of the moon Mimas creates a smudge on the southern hemisphere of Saturn in this view from the Cassini spacecraft. Image taken Jan. 21, 2012.