Geologists from Brown University have developed a promising new explanation for a mysterious type of crater on the surface on Mars.
Drifting sand is steadily filling the craters of Saturn's largest moon, Titan, making it look much younger than it is.
NASA's twin Grail probes have revealed the surface of the moon in unprecedented detail, showing unbelievably deep cracks, craters and tectonic structures.
The best place to look for life on Mars and other planets could be the impact craters of asteroids.
NASA's Cassini spacecraft has made its second-closest visit to Saturn's icy moon Helene, snapping details of its Saturn-facing side.
The moon was blitzed by two different sets of asteroids or comets in its youth, according to new results from NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft.