PBS
Pbs Learning Media: Meteor Showers
This video segment adapted from NASA uses animation to illustrate the properties of meteor showers and comets. Included is are visualizations of a comet's tail and of Earth passing through a debris stream left behind by meteoroids.
Other
American Meteor Society: Comets & Meteor Showers
This site from the American Meteor Society contains links to a calendar of meteor shower events and links to information on meteor showers. Also, contains information on comets.
Space.com
Space.com: Comets Data Sheet
This resource explains what comets are, where they come from, and how comets can cause meteor showers.
Other
Space weather.com
Want to know what the current weather conditions are in space? Find everything here you may want to know about the latest solar flares, sunspots, asteroids and more. Site also includes essential web links to quench any user's thirst for...
Other
Cometography.com: 1 P/halley
This site provides a detailed description of the Comet Halley. Content includes historical highlights and images.