![Galileo Galilei (1564-1642) demonstrating his telescope, Venice, 1609. In this artist's reconstruction Galileo, Italian astronomer, mathematician and physicist, is showing his telescope to the Doge and the Venetian Senators. From 'Vies des Galileo Galilei (1564-1642) demonstrating his telescope, Venice, 1609. In this artist's reconstruction Galileo, Italian astronomer, mathematician and physicist, is showing his telescope to the Doge and the Venetian Senators. From 'Vies des](https://c8.alamy.com/comp/D96P3W/galileo-galilei-1564-1642-demonstrating-his-telescope-venice-1609-D96P3W.jpg)
Galileo Galilei (1564-1642) demonstrating his telescope, Venice, 1609. In this artist's reconstruction Galileo, Italian astronomer, mathematician and physicist, is showing his telescope to the Doge and the Venetian Senators. From 'Vies des
Y-40 The Deep Joy - Padua, November 30th, 1609. Galileo Galilei, through his telescope, was the first to observe and sketch the Moon's surface. Visit Y-40 The Deep Joy, the world's deepest
![Galileo Galilei demonstrating his telescope, Venice, 1609. In this... Foto di attualità - Getty Images Galileo Galilei demonstrating his telescope, Venice, 1609. In this... Foto di attualità - Getty Images](https://media.gettyimages.com/id/113445885/it/foto/galileo-galilei-demonstrating-his-telescope-venice-1609-in-this-artists-reconstruction-galileo.jpg?s=1024x1024&w=gi&k=20&c=_hPCjY9WqweJhleHz_qJ8bhLbs2zjOYxehUN4C5-9MI=)
Galileo Galilei demonstrating his telescope, Venice, 1609. In this... Foto di attualità - Getty Images
![Galileo and the Telescope | Modeling the Cosmos | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress Galileo and the Telescope | Modeling the Cosmos | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress](http://www.loc.gov/static/collections/finding-our-place-in-the-cosmos-with-carl-sagan/images/galileo.jpg)