If this doesn't blow your mind, nothing will:
[N]ote how you can faintly see the dark side of Saturn, to the left. The clouds on that side of the planet are not being lit by the Sun, but by the reflected light from the rings themselves! In the same way our own Moon can be bright enough to read by, Saturn's rings illuminate its night. Imagine: Saturn, by ringshine.Go check out the high-resolution original.