... Prometheus and the Rings of Saturn . ... Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: In Greek Mythology, Prometheus was known for stealing fire from the gods. Ironically, in a story for more modern times Prometheus may also become known for stealing, but this time for stealing icy particles from Saturn's rings. This eerie close-up from the Cassini spacecraft shows the 100 kilometer-long Saturnian moon Prometheus orbiting near the inner edge of Saturn's F ring . ...