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"The Closed World to the Infinite Universe," Koyré explores the transition in scientific thought from the medieval worldview, characterized by a closed and geocentric universe, to the modern conception of an infinite and heliocentric universe. Koyré's work is often associated with the historiography of the Scientific Revolution and the development of early modern science.The book's main focus is on the shift from the Ptolemaic cosmology, which placed the Earth at the center of a finite and ordered cosmos, to the Copernican heliocentric model, which challenged traditional views of the universe's structure and position. Koyré examines the philosophical, cultural, and scientific factors that contributed to this transformative shift in understanding.Koyré's writing is characterized by its depth and intellectual rigor. He discusses how the work of figures such as Copernicus, Kepler, and Galileo led to the emergence of a new conception of the universe, one that was no longer confined to a finite, enclosed realm but extended infinitely into space.