Ganymede is the biggest moon in the solar system that might have more water than Earth and might have a life.
The Solar System could have 100 new planets including Earth's Moon.
Jupiter's icy moon, Ganymede, and our own planet Earth may have more in common than you might have thought at first.
NASA scientists are learning a bit more about the largest moon in our solar system, Ganymede. They've discovered that Jupiter's moon may have ice and oceans stacked up in several layers like a club sandwich.
