The Ptolemaic system of the universe, with the earth at the center, had held sway since antiquity as authoritative in philosophy, science, and church teaching. Following his observations of the heavenly bodies, Nicolaus Copernicus (1473-1543) abandoned the geocentric system for a heliocentric model, with the sun at the center. His remarkable work, On the Revolutions of Heavenly Spheres, stands as one of the greatest intellectual revolutions of all time, and profoundly influenced, among others, Galileo and Sir Isaac Newton.

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.

An analysis of the astronomer's pivotal sixteenth-century work traces how his challenge to beliefs about an Earth-centric solar system had a profound influence on the ways in which humanity understands itself and the universe.

Galileo’s Dialogue Concerning the Two Chief World Systems, published in Florence in 1632, was the most proximate cause of his being brought to trial before the Inquisition. Using the dialogue form, a genre common in classical philosophical works, Galileo masterfully demonstrates the truth of the Copernican system over the Ptolemaic one, proving, for the first time, that the earth revolves around the sun. Its influence is incalculable. The Dialogue is not only one of the most important scientific treatises ever written, but a work of supreme clarity and accessibility, remaining as readable now as when it was first published. This edition uses the definitive text established by the University of California Press, in Stillman Drake’s translation, and includes a Foreword by Albert Einstein and a new Introduction by J. L. Heilbron.

Includes "Commentariolus," Copernicus' hypotheses for heavenly motions; "Narratio Prima," popular introduction to Copernican theory; and "The Letter Against Werner," refutation of the views of a contemporary. Extensive editorial apparatus.

Controversial at the time, Copernicus's discoveries led to the scientific revolution, and a greater understanding of our place in the universe. An accessible, abridged edition with a new introduction. Renaissance Natural philosopher Nicolaus Copernicus's pioneering discovery of the heliocentric nature of the solar system is one of the few identifiable moments in history that define the understanding of the nature of all things. His great work was the consequence of long observation and resulted in the first stage of the Scientific Revolution by correctly positing that the earth and other planets of the solar system revolved around the sun. Not only did this promote further study to understand the place of humanity in the world and the universe, it questioned the authority of the organised Christian Church in the West to be the keeper of fundamental truths. Ultimately this would lead to the Enlightenment, and the separation of religion, government and science. The FLAME TREE Foundations series features core publications which together have shaped the cultural landscape of the modern world, with cutting-edge research distilled into pocket guides designed to be both accessible and informative.