Moons, Moons, Moons

Jupiter is surrounded by at least 67 moons-- more are found every now and then.  In September, 2010, for example, NASA found two more.

A new sttudy of those moons reveal both are extremely small-- under two miles across each.  They both orbit millions of miles from Jupiter.  Most of Jupiter's moons are small bodies.  Some are likely captured asteroids, and others, like these two, could be fragments of comets or asteroids that collided.

If these two moons are in fact comet fragments, they might contain water ice or other useful volatiles.  In that case, sometime in the future, one of them might serve as an initial base for an early human expedition to Jupiter.