Traditional natural philosophy with its bookish methods and basic indebtedness to Aristotle harbored innovations of many different kinds in the late Renaissance. I compare the modes of innovation and of adherence to tradition in the Universae naturae theatrum of Jean Bodin, who worked outside the university although his work was cited by German professors, and in the university teaching of Jean-Cecile Frey. I argue that authorial self-presentation and ideas about the proper relation of philosophy and religion played crucial roles in (...) making innovations palatable or not in different university contexts. (shrink)

: This paper offers my current view of a joint research project, with Bernard R. Goldstein, that examines Kepler's unification of physics and astronomy. As an organizing theme, I describe the extent to which the work of Kepler led to the appearance of the form of Copernicanism that we accept today. In the half century before Kepler's career began, the understanding of Copernicus and his work was significantly different from the modern one. In successive sections I consider the modern conception (...) of Kepler's contribution to Copernicanism, the most influential sixteenth century view of Copernicus's work and its sequel, Kepler's work from the viewpoint of this tradition, and finally the historical origins of the modern view of Copernicanism. (shrink)

Comme la nova de 1604 et les trois comètes de 1618, qui engagèrent Galilée et les jésuites du Collège romain dans un long débat, la comète de 1664 a relancé la curiosité et l'attente des astronomes et des astrologues. L'article analyse quelques aspects de ce débat européen, en se focalisant sur l'observatoire de l'école de Santa-Lucia de Bologne, où Giovan Battista Riccioli et ses «associés» avaient, depuis longtemps, développé une activité expérimentale connue dans toute l'Europe pour sa précision. Il étudie (...) ensuite la renaissance des scientiae mediae, c'est-à-dire principalement la géographie et l'hydrométrie, en cherchant à éclairer les conditions socioculturelles dans lesquelles de nouvelles figures professionnelles, comme celles de l'ingénieur et du technicien, ont pris naissance dans la Bologne du XVIe siècle. (shrink)