Unfathomably deep oceans on alien water worlds? Hundreds or thousands of kilometers … Unfathomable. Bottomless. Very deep.

Distant water exoplanets might have oceans thousands of miles deep. That’s in contrast to Earth’s ocean, which is about 6.8 miles (about 11 km) deep at its deepest point.


Water worlds – planets or moons with global oceans – used to be considered part of science fiction, but we are starting to learn now that, not only do they exist, they might actually be fairly common.


In our own solar system, the moons Europa, Enceladus, Titan and Ganymede are known or suspected to have such oceans beneath their outer ice crust. Even Pluto is now thought to have one!

Sourced through Scoop.it from: earthsky.org