Comet Tempel 1 as it appeared on August 21, 2000, at a visible wavelength of 6500 Angstroms. The color scheme is false; least-to-most light is represented by green-to-white. This picture is the composite of 19 separate images of the comet, and since the comet moves across the sky with respect to the background stars, those stars appear as dotted lines. Credit: University of Hawaii
