Saturn

Beautiful photos of Saturn and its moons:

http://www.boston.com/bigpicture/2009/04/cassinis_continued_mission.html

If I’m remembering correctly, Cassini was a controversial probe because it is powered with plutonium. There were concerns about showering Florida with plutonium in an accident, and other concerns about sending a toxic, human-fabricated element into outer space.

But, it has also been a great probe.