Iapetus features a high-contrast surface of light and dark ... Tethys travels close to Saturn and feels the gravitational pull of the planet particularly strongly. The heat from Saturn may ...

Not that it was a competition, but Saturn surpassed Jupiter in known moons a few years ago. Now the giant planet may never ...

The others orbit the planet in the opposite direction, or in retrograde. The arcs near the center are the orbits of Titan and Iapetus, two of Saturn's large outer moons. For scale, the white ...