jseal - You may have heard about the ESA's Rosetta mission to make a soft landing on a comet. One of the big unknowns of that mission is the internal structure of the nucleus, how it is stuck together, and the strength of the material.

These are the things the Europeans will want to learn from the analysis of the Deep Impact mission. The data will enable them to tighten up their landing scenerio when putting the Rosetta lander on the nucleus. They'll need all the modelling they can get - a soft landing is a LOT more difficult that what Deep Impact did.

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