In this animation, two views of Tempel 1, from Deep Impact in 2005 and Stardust in 2011, have been warped to match their geometry and then morphed back and forth. Some of the apparent motion between the two images is due to the different viewing geometry, but there are a few visible changes to the surface between the pair of images, particularly along the edge of the smooth flow-like feature at the bottom of the image and at the site of the Deep Impact crash between the two dark-rimmed circular features.

NASA / JPL / Cornell / animation by Daniel Macháček