Pluto in Motion!  The link shows an animation of the planet Pluto that was produced by taking two images, 30 minutes apart,  of the sky where pluto should be.  Then putting them in a gif file so they alternate in a continuous loop.   The result is a image where most of the stars appear stationary, but one 'star' appears to move back and forth.   The star is of course Pluto.   During the 30 minutes in between the two images, the planet moved 5,400 miles.   You can find pluto about 2/3 of the way across the image and about half way down.

   Pluto in motion