Europa Clipper - one of the most advanced spacecraft ever sent to another planet - aims to explore Jupiter's icy moon ...

And scientists believe Europa sports a deep, vast ocean beneath its icy crust, making it a top candidate in the hunt for alien life. But these are not the planet's only celestial tag-alongs.

"The mission's detailed exploration of Europa will help scientists better understand the astrobiological potential for habitable worlds beyond our planet." But it isn't all plain sailing now that ...

Enceladus, a moon of Saturn, and Europa and Ganymede, moons of Jupiter, are all thought to have saltwater oceans buried under icy shells. Dwarf planets Pluto and Ceres are also suspected of having ...