Despite everything we know about Europa, the frozen moon continues to throw mysteries at us. For one, there are these massive double ridges that extend for hundreds of miles across the surface.

A British team has won first place in the Aqualunar Challenge for developing a system that purifies water extracted from lunar ice.

NASA’s revamped Orbilander mission promises to bring us closer to discovering life on Saturn’s enigmatic moon, Enceladus. The ...