Looking back at the collision scene

Deep Impact took this dazzling image, so clear it looks like an artist's conception, of the plume caused by its impact, as seen from the back, shady side of the comet's nucleus. Details of the structure of the ejecta plume may help the science team figure out exactly what happened during the impact, including details of the structure of the nucleus itself. How solid or how porous is it? We may know in the next few days.