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NASA
Nasa: The Space Place: What's in the Heart of a Comet?
NASA site explores what a comet's nucleus is composed of. Animation and photographs are provided as well.
NASA
Nasa: Comet Hale Bopp Images
This site contains 5,161 images of the Hale-Bopp comet from 1995 to 2000. This incredible photo archive is definitely worth a visit.
Other
University of Leicester: Comets
A detailed look at comets. Content outlines our observational history, as well as the origins of comets and an explanation of the appearance of comets.
University of California
Univ. Of Cal Berkeley: The Comet's Tale
Site provides extensive information in the study of comets. Includes excellent graphics that depict what comets look like as they travel through the solar system. Also includes information on how comets may have effected the Earth's...
PBS
Pbs: Nova: Doomsday Asteriod: Educator's Guide to Kitchen Comets
Instructions for making a simulated comet nucleus from simple materials.
Nine Planets
The Nine Planets: Comets
A detailed description of comets, their distinct parts, and the known comets in our solar system. Links are also provided for additional information on related subjects.
NASA
Nasa: Landing on Mystery Stuff
At this online lesson plan read about the exciting Comet Nucleus Sample Return Mission. Understand comets and then go and do the word search.
PBS
Nova: Doomsday Asteroid Hale Bopp & Hyakutake
NOVA provides a report on comet Hale-Bopp and comet Hyakutake. Content includes discovery and observational information.