©2006, 2002 WGBH Educational Foundation. All Rights Reserved.

Adapted from NOVA: "Galileo's Battle for the Heavens". A NOVA Production by Green Umbrella, LTD for WGBH/Boston in association with Channel 4. Still images courtesy of Nicholaus Copernicus Museum in Frombork, Istituto e Museo di Storia della Scienza, Florence, Calvin College Observatory, Image Bank Film by Getty Images, ©Paul Almasy/CORBIS and ©Archivo Iconografico, S.A./CORBIS.