The largest moon in our solar system is hiding an ocean under its surface, according to observations made with the Hubble Space Telescope. Aurorae spotted by the telescope, confirmed the long-standing theory, and the findings were announced during a NASA teleconference this morning. The news comes just a day after we found out that Enceladus, an icy moon of Saturn, likely has hydrothermal activity in its own subsurface ocean.
via The Verge
