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. Rather than focusing on the philosophical implications of Galileo's work, this study examines his enduring scientific achievements. Detailed accounts, including many excerpts from Galileo's own writings, offer insights into his work on motion, mechanics, hydraulics, strength of materials, and projectiles; his construction of telescopes and pioneering astronomical observations; his theory of tides; and many other enduring scientific legacies. Unabridged republication of the 1978 edition. 36 black-and-white illustrations.