Sometime in late June or July 1609, Italian astronomer and physicist Galileo Galilei constructed his first spyglass—a simple contraption of lenses at the ends of a tube. The previous year in The Hague, a Dutchman named Hans Lipperhey had filed for a patent on the device, but it was Galileo who would go on to make it famous.
Full article by Saswato R. Das and slideshow on Scientific American
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