These animations, composed of images taken by the OSIRIS Narrow Angle Camera on board ESA’s Rosetta spacecraft, shows how the brightness of Comet 9P/Tempel 1 developed after impact.
The separate false-colour images in this sequence from OSIRIS were taken at five-minute intervals around the impact time of 07:52 CEST (05:52 GMT/UT).
Although in the false-colour images (a still seen here at right) the increase in visual brightness is not so obvious, it becomes very clear in the animated surface plot below.
Full press release and images online at http://www.esa.int/SPECIALS/Rosetta/SEMSJ06DIAE_0.html