NASA's Cassini spacecraft took a swing by Saturn's moons Mimas and Calypso over the weekend and sent back some fantastic shots.
Mimas is the 20th in size of Saturn's 62 moons with a diameter of about 246 miles, and it may be the smallest body in the solar system that has been rounded by gravitational forces. It isn't completely round, however, as can be seen in the image above, taken from around 15,000 miles away. Tidal forces have made its longest axis 10 percent greater than its shortest.
Calypso, seen in the second image of this gallery, is a tiny, odd-shaped moon that was only discovered 30 years ago. It has one of the most reflective surfaces in the solar system, having been sandblasted by particles in Saturn's E-ring, emitted by the plumes of the moon Enceladus.
Thanks to a recent life extension for the Cassini spacecraft, which has been exploring Saturn since 2004, we will be enjoying more images like these until 2017.