Iapetus

Intriguing Iapetus

In Arthur C. Clarke's novel 2001: A Space Odyssey, the spaceship Discovery heads to Saturn's enigmatic moon Iapetus in search of ET (in the movie, Discovery instead ventures to Jupiter). In real life, NASA's Cassini spacecraft flew by Iapetus for another reason: to provide answers to an enduring mystery: Why is the leading hemisphere as…

Iapetus and its giant ridge

The Curious Avalanches of Iapetus

Saturn's two-faced moon hosts extraordinary avalanches that cascade much longer than they should. Figuring out what makes them flow might help scientists better understand landslides on Earth.