Astronomy Tuesday

Cassini, of course. The probe may have plunged into the cloudy unknown of Saturn's surface last year, but its magnificent images still amaze me.

This one, from 2005, shows two of the smaller moons, Tethys and Mimas, but what's really cool here is the shadow of the rings  across the top of the planet. (The rings themselves are seen edge-on between the two moons.)