Exploring The Planets: Comets
http://www.nasm.si.edu/ceps/etp/comets/History, orbits, composition, ways comets are studied, relation to meteor showers. Comets Halley, Shoemaker-Levy 9. From the National Air and Space Museum.
Submitted in section: Astronomy: Solar System: Small Bodies: Comets: Exploring The Planets: Comets