Original Scholarly Monograph

Between 1608 and 1610 the canopy of the night sky was ripped open by an object created almost by accident: a cylinder with lenses at both ends. Galileo’s Telescope tells how this ingenious device evolved into a precision instrument that would transcend the limits of human vision and transform humanity’s view of its place in the cosmos.

This fascinating, scholarly study by one of the world's foremost authorities on Galileo offers a vivid portrait of one of history's greatest minds. Detailed accounts, including many excerpts from Galileo's own writings, offer insights into his work on motion, mechanics, hydraulics, strength of materials, and projectiles. 36 black-and-white illustrations.

"This is must reading for historians of science and a delight for the interested public. From his access to many primary sources in the Vatican Library and from his broad knowledge of the history of the 17th century, Finocchiaro acquaints readers in an interesting manner with the historical facts of Galileo's trial, its aftermath, and its repercussions. Unlike many other works which present predetermined and, at times, prejudiced judgments, this work provides exhaustive evidence to allow readers to develop their own informed opinion on the subject.”—George V. Coyne, Director, Vatican Astronomical Observatory “The tragic condemnation of Galileo by the Roman Catholic Church in 1633 has become the single most potent symbol of authoritarian opposition to new ideas. Pioneering in its scope, Finocchiaro's book provides a fascinating account of how the trial and its cultural significance have been freshly reconstructed by scholars and polemicists down the ages. With a philosopher's eye for fine distinctions, the author has written an exciting commentary on the successive appearance of new primary sources and their exploitation for apologetic and secular purposes.”—John Hedley Brooke, author of Science and Religion: Some Historical Perspectives "If good history begins with good facts, then Retrying Galileo should be the starting point for all future discussions of the post-trial phase of the Galileo affair. Maurice Finocchiaro's myth-busting documentary history is not only a repository of little-known sources but a pleasure to read as well.”—Ronald L. Numbers, co-editor of When Christianity and Science Meet “Retrying Galileo tells the less well-known half of the Galileo affair: its long and complex history after 1633. Finocchiaro has performed an invaluable service in writing a book that explores how the trial and condemnation of Galileo has been received, debated, and reinterpreted for over three and a half centuries. We are not yet done with this contentious story.”—Paula E. Findlen, Ubaldo Pierotti Professor of Italian History and Director of the Science, Technology and Society Program, Stanford University

Two leading authorities on Galileo offer a brilliant revisionist look at the career of the great Italian scientist.

An innovative exploration of the development of a revolutionary optical device and how it changed the world. Between 1608 and 1610 the canopy of the night sky changed forever, ripped open by an object created almost by accident: a cylinder with lenses at both ends. Galileo’s Telescope tells the story of how an ingenious optical device evolved from a toy-like curiosity into a precision scientific instrument, all in a few years. In transcending the limits of human vision, the telescope transformed humanity’s view of itself and knowledge of the cosmos. Galileo plays a leading—but by no means solo—part in this riveting tale. He shares the stage with mathematicians, astronomers, and theologians from Paolo Sarpi to Johannes Kepler and Cardinal Bellarmine, sovereigns such as Rudolph II and James I, as well as craftsmen, courtiers, poets, and painters. Starting in the Netherlands, where a spectacle-maker created a spyglass with the modest magnifying power of three, the telescope spread like technological wildfire to Venice, Rome, Prague, Paris, London, and ultimately India and China. Galileo’s celestial discoveries—hundreds of stars previously invisible to the naked eye, lunar mountains, and moons orbiting Jupiter—were announced to the world in his revolutionary treatise Sidereus Nuncius. Combining science, politics, religion, and the arts, Galileo’s Telescope rewrites the early history of a world-shattering innovation whose visual power ultimately came to embody meanings far beyond the science of the stars. Praise for Galileo’s Telescope “One of the most fascinating stories in the history of science.” —Mark Archer, The Wall Street Journal “In broad outline, the story of Galileo and the first use of a telescope in astronomy is well known. Bucciantini, Camerota, and Giudice take a new look at this seminal event by focusing on how the news spread across Europe and how it was received. Their well-written narrative examines the central issues using papers, paintings, letters, and other contemporary documents . . . After four centuries [Galileo’s] reputation has been thoroughly vindicated.” —D. E. Hogg, Choice

This book, translated from Italian, discusses the influence of Galileo on Hobbes’ natural philosophy. In his De motu, loco et tempore or Anti-White (~ 1643), Thomas Hobbes describes Galileo as “the greatest philosopher of all times”, and in De Corpore (1655), the Italian scientist is presented as the one who “opened the door of all physics, that is, the nature of motion.” The book gives a detailed analysis of Galileo’s legacy in Hobbes’s philosophy, exploring four main issues: a comparison between Hobbes’ and Mersenne’s natural philosophies, the Galilean Principles of Hobbes’ philosophical system, a comparison between Galileo’s momentum and Hobbes’s conatus , and Hobbes’ and Galileo’s theories of matter. The book also analyses the role played by Marin Mersenne, in spreading Galileo’s ideas in France, and as a discussant of Hobbes. It highlights the many aspects of Hobbes’ relationship with Galileo: the methodological and epistemological elements, but also the conceptual and the lexical analogies in the field of physics, to arrive, finally, at a close comparison on the subject of the matter. From this analysis emerges a shared mechanical conception of the universe open and infinite, that replaces the Aristotelian cosmos, and which is populated by two elements only: matter and motion.

Although recent works on Galileo’s trial have reached new heights of erudition, documentation, and sophistication, they often exhibit inflated complexities, neglect 400 years of historiography, or make little effort to learn from Galileo. This book strives to avoid such lacunae by judiciously comparing and contrasting the two Galileo affairs, that is, the original controversy over the earth’s motion ending with his condemnation by the Inquisition in 1633, and the subsequent controversy over the rightness of that condemnation continuing to our day. The book argues that the Copernican Revolution required that the hypothesis of the earth’s motion be not only constructively supported with new reasons and evidence, but also critically defended from numerous old and new objections. This defense in turn required not only the destructive refutation, but also the appreciative understanding of those objections in all their strength. A major Galilean accomplishment was to elaborate such a reasoned, critical, and fair-minded defense of Copernicanism. Galileo’s trial can be interpreted as a series of ecclesiastic attempts to stop him from so defending Copernicus. And an essential thread of the subsequent controversy has been the emergence of many arguments claiming that his condemnation was right, as well as defenses of Galileo from such criticisms. The book’s particular yet overarching thesis is that today the proper defense of Galileo can and should have the reasoned, critical, and fair-minded character which his own defense of Copernicus had.