This beautifully illustrated book tells the story of the biggest and most awe-inspiring of all comets: those that have earned the title 'Great'. It focuses on Great Comets Hyakutake and Hale-Bopp, which gripped attention world-wide in 1996 and 1997. For everyone interested in astronomy, this exciting book reveals the secrets of the Great Comets and their impact on science and human culture. It surveys comet-bound space missions and provides essential tools for keeping up-to-date with comet discoveries in the future.