Nasa has found 17 planets that it thinks could have secret oceans lurking below the surface ... planets outside of our own solar system – all have icy shells that could be hiding flowing ...

Earth is distinguished from all other known planets by the presence of a warm, salty ocean that covers more than two-thirds of its surface. Its value to our planet is incalculable, but has been ...

They comprise almost half of all rocky exoplanets discovered so ... week changes that with an in-depth look at how these planets’ molten oceans affect their size and evolution.

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 ...