“This is now stronger evidence for an ocean,” said Joachim Saur, a professor of geophysics at the University of Cologne in Germany. Unlike our salty waters, however, Ganymede’s ocean is buried under 95 miles of ice. Ganymede is the largest moon in our solar system and was observed too by the Galileo spacecraft. The made discovery is important because this opens possibilities for life beyond Earth, if we understand the life as we know it. Jupiter became already a potential location of life because scientists have confirmed too the existence of an ocean on another of its moons, Europa. This week in the journal Nature, an international team of scientists reported evidence for hydrothermal vents on the Saturnian moon Enceladus, so the existence of water seems to be pretty common.