Jupiter’s moon Ganymede
Though Chinese astronomical records claim that astronomer Gan De may have spotted a moon of Jupiter (probably Ganymede) with the naked eye as early as 365 BCE, Galileo [...]
jupiter
Jupiter’s Largest Moon Has an Ocean
A salty ocean is lurking beneath the surface of Jupiter‘s largest moon, Ganymede, scientists using the Hubble Space Telescope have found. The ocean on Ganymede — [...]