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...
Other
Cometography.com: C/1995 01 (Hale Bopp)
This site provides a detailed overview of the comet C/1995 01 (Hale-Bopp), the great comet of 1997. Content includes discovery, and observational and orbit information, as well as several images.