A frozen area of Pluto, known as the ‘heart’ may harbour a slushy ocean between 150 and 200 km beneath its surface, NASA scientists say.
This could explain why part of the region – Pluto’s most prominent feature – remains securely aligned with Charon, its largest moon.
Its believed the central area contains as much water as all of Earth’s seas.
The dwarf planet becomes the latest in a growing list of worlds in the solar system which are believed to have underground oceans. Scientists claim there could potentially be life residing in some of them.