Cassini has sighted Prometheus and Pandora, the two F-ring-shepherding moons whose unpredictable orbits both fascinate scientists and wreak havoc on the F ring. Prometheus (102 kilometers, or 63 miles ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. NASA's Cassini mission to Saturn came to an end on Sept. 15, 2017 when the spacecraft dove into ...

A pair of moons, Pandora and Prometheus, continue their shepherding duties near Saturn’s thin F ring. Pandora (81 kilometers, or 50 miles across) orbits outside the F ring and, with the inner shepherd ...

Two of Saturn’s moon’s Prometheus (102 kilometers, or 63 miles across) and Pandora (84 kilometers, or 52 miles across), are seen here shepherding the planet’s narrow F-ring. Prometheus overtakes ...

NASA's Cassini mission to Saturn came to an end on Sept. 15, 2017 when the spacecraft dove into Saturn's atmosphere. As Cassini headed for its final moments, it turned back from the planet to point ...