Dave Dexter, composer of The Galilean Suite, four tone poems about the largest moons of Jupiter—Io, ... [+] Ganymede, Callisto and Europa. It's fair to say that of all the moons, it’s Io—the ...

Jupiter's largest moons, known as the Galilean moons, are Io, Europa, Ganymede, and Callisto. These moons were discovered by Galileo Galilei in 1610 and are significant for their unique ...

If you look at the gas giant with a telescope as it's rising, you'll spot three of its Galilean moons: Io alone to the west, with Ganymede (closer) and Callisto (farther) to the east. But that ...

It's tugged in all directions during its orbit by the gravity of Jupiter and the three other Galilean moons (Europa, Ganymede and Callisto). The friction builds up heat inside Io and causes ...