Halley's Comet Halley's Comet Weissman Halley's Comet Halley's Comet http://www.britannica.com/topic/Halleys-Comet http://www.britannica.com/topic/Halleys-Comet ID Halley's Comet ID Weissman Halley’s Comet 1066 passing of the comet Halley's Comet