NASA / JPL / Cornell / color composite by Daniel Macháček
Crossed-eye stereo view of Tempel 1 from Stardust
To see comet Tempel 1 in 3D, enlarge the image, look at it, and relax; slowly cross your eyes, trying to get the two pictures of the comet to overlap. Once they overlap in the center of your vision, bring your eyes into focus on the overlapped view, and it should appear three-dimensional. The image has been artificially colorized based on color images from the Deep Impact mission.