Figure 8-32 Visits to Comet Tempel 1 and Comet 67P (a) This composite image of Comet Tempel 1 has higher resolution at the bottom, as the projectile from Deep Impact headed in that direction. The smooth regions on the comet have yet to be explained. (b) Thirty seconds before the projectile struck the comet. (c) Seconds after impact, hot debris explodes away from the comet nucleus. The white horizontal half-ellipses are areas where the CCDs were overloaded with light from the event. (d) An image taken 67 seconds after impact. Within minutes, the cloud of debris became much larger than the entire nucleus. (e) Comet 67P/Churyumov-Gerasimenko as photographed by the Rosetta spacecraft in 2014. http://rosetta.jpl.nasa.gov/gallery/images/comet-67p/churyumov-gerasimenko