Galileo’s Sidereus Nuncius (or a Sidereal Message)

Translated from the Latin by William R. Shea, Introduction and notes by William R. Shea and Tiziana Bascelli. 2nd Printing, minor revisions—August 2012, 132pp., illus., paperback From the Preface: An instrument can change the world and compel us to rethink our place in the universe. The telescope did just this, but only when it was used by Galileo, whose eye was prepared to see new things and whose hand was able to depict what he saw. It was not only because Galileo was a gifted and persistent observer, but also because he was an exceptional draughtsman that he was able to discover what others had failed to see or lacked the ability to record. The telescope, invented around 1590 in Italy, was a crude device that enlarged an object four or five times and was little more than a plaything. Galileo saw its potential. He also had the good fortune of having access to the best lenses in Europe, those that were made on the island of Murano near Venice, until the present day the capital of