Which of Jupiter's moons is most fit to colonize?

None are particularly fit to colonize. All four of the largest (the Galilean moons) are also orbiting within Jupiter's impressive radiation belts, and since none of these moons has much of an atmosphere to block it, the surfaces of all four moons are exposed to this radiation. read more

None are particularly fit to colonize. All four of the largest (the Galilean moons) are also orbiting within Jupiter’s impressive radiation belts, and since none of these moons has much of an atmosphere to block it, the surfaces of all four moons are exposed to this radiation. read more

Ganymede (Jupiter III): Ganymede is the largest moon of Jupiter and in the Solar System, and the only moon known to have a magnetic field. It is the ninth-largest object in the Solar System, and the largest without a substantial atmosphere. read more

In addition, colonies on the moons of Jupiter could enable missions to Jupiter itself, where hydrogen and helium-3 could be harvested as nuclear fuel. Illustration of Europa (foreground), Jupiter (right) and Io (middle) showing water plumes that reach the surface. read more