Check Out these Great Links! http://nai.arc.nasa.gov/students/index.cfm http://deepimpact.umd.edu/index.html http://deepimpact.jpl.nasa.gov/index.cfm http://stardust.jpl.nasa.gov/home/index.html
About Comets

Shoemaker-Levy 9  http://www.nineplanets.org/sl9.html

LINEAR  http://www.solarviews.com/eng/linear.htm

Hyakutake  http://www2.jpl.nasa.gov/comet/hyakutake/

Tempel 1  http://www.solarviews.com/eng/tempel1.htm

Halley  http://www.nineplanets.org/halley.html

Hale-Bopp  http://encke.jpl.nasa.gov/hale_bopp_info.html