The Copernican Achievement

Nicolaus Copernicus gave the world perhaps the most important scientific insight of the modern age, the theory that the earth and the other planets revolve around the sun. He was also the first to proclaim that the earth rotates on its axis once every twenty-four hours. His theory was truly radical: during his lifetime nearly everyone believed that a perfectly still earth rested in the middle of the cosmos, where all the heavenly bodies revolved around it. One of the transcendent geniuses of the early Renaissance, Copernicus was also a flawed and conflicted person. A cleric who lived during the tumultuous years of the early Reformation, he may have been sympathetic to the teachings of the Lutherans. Although he had taken a vow of celibacy, he kept at least one mistress. Supremely confident intellectually, he hesitated to disseminate his work among other scholars. It fact, he kept his astronomical work a secret, revealing it to only a few intimates, and the manuscript containing his revolutionary theory, which he refined for at least twenty years, remained "hidden among my things." It is unlikely that Copernicus' masterwork would ever have been published if not for a young mathematics professor named Georg Joachim Rheticus. He had heard of Copernicus' ideas, and with his imagination on fire he journeyed hundreds of miles to a land where, as a Lutheran, he was forbidden to travel. Rheticus' meeting with Copernicus in a small cathedral town in northern Poland proved to be one of the most important encounters in history. Copernicus' Secretrecreates the life and world of the scientific genius whose work revolutionized astronomy and altered our understanding of our place in the world. It tells the surprising, little-known story behind the dawn of the scientific age.

In 1543, Nicolaus Copernicus publicly defended his hypothesis that the earth is a planet and the sun a body resting near the center of a finite universe. But why did Copernicus make this bold proposal? And why did it matter? The Copernican Question reframes this pivotal moment in the history of science, centering the story on a conflict over the credibility of astrology that erupted in Italy just as Copernicus arrived in 1496. Copernicus engendered enormous resistance when he sought to protect astrology by reconstituting its astronomical foundations. Robert S. Westman shows that efforts to answer the astrological skeptics became a crucial unifying theme of the early modern scientific movement. His interpretation of this long sixteenth century, from the 1490s to the 1610s, offers a new framework for understanding the great transformations in natural philosophy in the century that followed.

Contents: Introduction; (1) The Libraries of Tycho Brahe & of Paul Wittich: The Misleading Attribution of the Copernican Annotations; Master Paul Wittich; Tycho's Attempts to Acquire Wittich's Library; & The Prague Tychoniana; (2) Wittich's Copernican Annotations: Reinhold's Annotations & the Liege "De revolutionibus"; The Vatican Wittich Copy; The Prague & Wroclaw Wittich Copies; & Why Annotate Four Copes of "De revolutionibus"?; (3) Reconstructing the Universe: Tycho's Early Transformations & Wittich's Visit; A Theft in the Castle?: Thycho's "Legal Brief" on the Ursus Affair, & Ursus' Account & Kepler's Interpretation; & Constructing Tycho's Cosmology. Appendix: The Vatican Annotations; & Wittich's Obituary in "Silesia Togata." Illus.

In Copernicus in the Cultural Debates of the Renaissance, Pietro Daniel Omodeo presents a general overview of the reception of Copernicus’s astronomical proposal from the years immediately preceding the publication of De revolutionibus (1543) to the Roman prohibition of heliocentric hypotheses in 1616. Relying on a detailed investigation of early modern sources, the author systematically examines a series of issues ranging from computation to epistemology, natural philosophy, theology and ethics. In addition to offering a pluralistic and interdisciplinary perspective on post-Copernican astronomy, the study goes beyond purely cosmological and geometrical issues and engages in a wide-ranging discussion of how Copernicus’s legacy interacted with European culture and how his image and theories evolved as a result.

Drawing on a half century of scholarship, of Polish studies of Copernicus and Cracow University, and of Copernicus's sources, this book offers a comprehensive re-evaluation of Copernicus's achievement, and explains his commitment to the uniform, circular motions of celestial bodies, and his views about hypotheses.

Revised edition re-creates the change from an earth- to a sun-centered conception of the solar system by focusing on an examination of the evidence available in 1615.