Technology
Galileo's Instruments of Credit: Telescopes, images, secrecy by Mario Biagioli
IN 1609, while he was professor of mathematics at Padua in Italy, and in his mid-40s, Galileo Galilei heard of the invention of the telescope by Hans Lippershey and constructed a vastly improved version with lenses that he ground himself. Within six years, the astronomical discoveries he made with it took him from being an …