NASA's Cassini probe is dead but its work is still blowing out minds. The nuclear-powered spacecraft orbited Saturn for 13 years, and sent back hundreds of thousands of images.

The photos include close-ups of the gaseous giant, its famous rings, and its enigmatic moons - including Titan, which has its own atmosphere, and icy Enceladus, which has a subsurface ocean that could conceivably harbour microbial life.