Wednesday, November 10, 2010

The Orbital Dance of Epimetheus and Janus

This is just too cool...

Two small moons of Saturn - Epimetheus and Janus - actually swap orbits every four years!  How incredible is that?  More details here at APOD.  Of course, the entire Cassini/Huygens mission to Saturn is utterly awesome, and the source of many wondrous and very expensive computer wallpapers.