In 1633 the Roman Inquisition concluded the trial of Galileo Galilei with a condemnation for heresy. The trial was itself the climax of a series of events which began two decades earlier (in 1613) and included another series of Inquisition proceedings in 1615-1616. Besides marking the end of the controversy that defines the original episode, the condemnation of 1633 also marks the beginning of another classic controversy-about the Galileo affair,...