The Cassini spacecraft has sent back thousands of beautiful photographs of Saturn and its moons, but this latest one has to rank as one of the best. This view of Saturn, as it is backlit by the Sun, is magnificent, almost surreal looking. And it’s real. In the lower left, two of Saturn’s moons can also be seen as small dots; Enceladus is closest to the planet and Tethys is a bit farther out. Simply breathtaking…