NASA Finds Vast Ocean on Jupiter's Moon Ganymede

NASA announced that it has evidence that Jupiter's moon Ganymede, the largest moon in our solar system, has a vast ocean lurking underneath its icy crust. WSJ's Monika Auger reports. Photo:.

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-stand .

Ganymede, the largest moon in the solar system, is home to a salty ocean with more water than all the water on Earth, NASA said today. While the moon,.