Spine's quiz was so succesful, i thought I'd try my own. One of these two images was captured by the Cassini space probe orbiting Saturn and is of Saturn's moon, Mimas. Can you tell which one?
If you think you know the answer, just point to the one you think isn't Mimas and say, "that's no moon...." You know the rest.
Extra Credit: Here's an additional fun quiz for any of you who believe that the Moon landings were faked: Which image shows no background stars? The real one taken by a space probe, or the one created in Hollywood?