This is a pretty exciting week for space exploration. While the Phoenix lander managed to image a single particle of Martian dust with its atomic force microscope and Hubble had orbited Earth more than 100,000 times, Cassini made a very close flyby of Enceladus, a moon of Saturn.
And one of the results from the Enceladus flyby is that Cassini managed to pinpoint the source of the incredible water geysers of Enceladus. They're deep cracks on the surface of the moon with icy debris all round them. I wonder what it would have looked like at ground zero when the geysers erupted?