Scientific Colloquium
March 4, 2005


This talk is the story of the stormy collaboration between two revolutionary astronomers, Tycho Brahe and Johannes Kepler. Kepler was one of the greatest astronomers of all time. Yet if it hadn't been for the now lesser known Tycho Brahe, the man for whom Kepler apprenticed, Kepler would be a mere footnote in today's science books. Brahe’s forty years of planetary observations - an unparalleled treasure of empirical data - contained the key to Kepler's historic breakthrough. But those observations would become available to Kepler only after Brahe's death. Based on recent forensic evidence and original research into medieval and Renaissance alchemy -- all buttressed by in-depth interviews with leading historians, scientists, and medical specialists -- the speakers have put together evidence that Tycho Brahe did not die of natural causes, as has been believed for four hundred years. He was systematically poisoned -- most likely by his assistant, Johannes Kepler.