NASA - Tempel 1 Ejecta Development

NASA's Deep Impact mission sent a probe to comet Tempel 1. An "impactor" was smashed into the comet, while the main probe watched on. Here are some cool pictures of the result, an ejection of material that was 10 times as large as expected.

I think it's fabulous that people are putting together space missions purely to smash stuff and see what happens. Really very cool.