Space Vistas on Instagram: "Prometheus, one of Saturn’s 146 known moons, is a small, irregularly shaped body named after the Greek Titan who stole fire from the gods. Discovered by Voyager 1 in October 1980, this potato-shaped moon measures roughly 85 × 50 × 35 miles (137 × 81 × 56 km) and is likely a porous mix of ice and rock, making it less dense than a solid ice ball. Orbiting Saturn every 14.7 hours at about 87,000 miles (139,000 km), Prometheus is a dynamic little world that plays a big ro