Study the shape of Comet Halley's nucleus in an enhanced image generated from data provided by the European spacecraft Giotto in 1986.

Explore the comet that appears every 76 years and learn more about its orbit, gravitational pull, and appearance.

Presents educational information, photos, and facts pertaining to what some call the most famous comet of all time.

Special issue from the Astronomical Society of the Pacific on Halley's Comet. Includes an events schedule and viewing tips.

"Universe in the Classroom" offers a postview look at Halley's Comet. Includes facts on the comet's core, rotation period and composition.