Using data from fly-by, orbiter, penetrometer, and lander missions, as well as from Earth-based telescopes, researchers have identified mass-movement features on the surfaces of Venus, Mars, and Mercury, the Martian moons of Phobos and Deimos, the Moon, the moons Io, Ganymede, Callisto, and Europa orbiting Jupiter, Iapetus orbiting Saturn, and the asteroids of 4 Vesta 433 Eros, 253 Mathilde, 951 Gaspra, 243 Ida, and 25143 Itokawa. Discussions of selected landslides on Mars, Venus, and Io highlight how knowledge of terrestrial landslide processes has been used to inform interpretation of geomorphic features on these bodies. New missions to bodies in the solar system continue to increase the availability of precise and accurate spatial information over large areas, enabling analysis of mass movements to extend beyond the Coulomb frictional model. With the availability of these data and the increasing sophistication of analyses that can be done, observations, interpretations, and explanations of mass-movement features on these bodies will increasingly inform our understanding of landslide triggering and emplacement on Earth.