Cassini, the robot explorer that has been orbiting Saturn now since December 2004,
is still going strong. It's most recent accomplishment was a close flyby of Saturn's moon Enceladus. On this flyby it was looking closely at the “tiger stripes” where jets of water are erupting from the surface. In the raw photo at right, you can see the “wrinkles” on Enceladus' icy surface.
The annual cost of the Cassini mission (which has done real science in orbit around Saturn for nearly six years) is less than the cost of the ammonia pumps on the ISS (which does absolutely nothing for science except suck money into a black hole).
Just sayin'...
