Ep 12. Jupiter's Planetlike System of Moons

Today we know of 79 Jovian moons: the spherical Io, Europa, Ganymede, and Callisto, and dozens of other smaller, odd-shaped satellites. Learn why Jupiter's gravitational forces, plus the orbital resonance of the three interior moons, make these some of the most promising places to search for life, and why scientists believe the Jovian system once included generations of other moons, now gone.