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The story of Galileo's telescope is well known, as he recounted it himself in the Starry Messenger. In July 1609, Galileo was in Venice, when he heard of an invention that allowed distant objects to be seen as distinctly as if they were nearby.
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www.hps.cam.ac.uk/starry/galtele.html
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Galileo invented many mechanical devices other than the pump, such as the hydrostatic balance. But perhaps his most famous invention was the telescope. Galileo made his first telescope in 1609, modeled after telescopes produced in other parts of Europe that could magnify objects three times.
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galileo.rice.edu/bio/narrative_6.html
galileo.rice.edu/bio/narrative_6.html
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Galileo's lead was one of practice, not theory, and it took about six months before others could make or obtain instruments good enough to see Jupiter's moons. With the verification of the phases of Venus by others, in the first half of 1611, Galileo's lead in telescope-making had more or less evaporated.
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galileo.rice.edu/sci/instruments/telescope.html
galileo.rice.edu/sci/instruments/telescope.html
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"A brief history of Galileo's telescope, its predecessors, and the "telescope race" it inspired. In a 150 or so years, telescope makers like Galileo started with a collection of eyeglass […]" ... Summary: A brief history of Galileo's telescope.
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cnx.org/content/m11932/latest/
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This article uses animations to help explain how Galileo's refractor and Newton's reflector telescopes worked, and how they remain the two standard types of optical telescopes used today. ... The spyglass-turned-telescope had limitations, some of which Galileo was able to design around. To reduce distortions such as...
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www.pbs.org/wgbh/nova/galileo/telescope.html
www.pbs.org/wgbh/nova/galileo/telescope.html
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The Evolution of the Telescope ... Galileo found out about this invention in the spring of 1609, and immediately set about improving it. He saw it as a possible way out of his financial difficulties. He was an oldest son, and so was responsible for his younger sisters’ dowries.
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galileoandeinstein.physics.virginia.edu/lectures/galtel...
galileoandeinstein.physics.virginia.edu/lectures/galtel.htm
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Refracting telescope - Wikipedia, the free encyclopedia
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A refracting or refractor telescope is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was o...
en.wikipedia.org/wiki/Refracting_telescope
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Be sure to tell us what you think of Google’s new logo and share your telescope and astronomy stories. Below is a 19th century depiction of Galileo showing his telescope to Donato.
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mashable.com/2009/08/24/galileos-telescope/
mashable.com/2009/08/24/galileos-telescope/
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Telescope development by Galileo ... The basic tool that Galileo used was a crude refracting telescope. His initial version only magnified 8x but was soon refined to the 20x magnification he used for his observations for ... They also have an excellent new site: Galileo's Telescope, the Instrument that Changed the World.
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outreach.atnf.csiro.au/education/senior/astrophysics/ga...
outreach.atnf.csiro.au/education/senior/astrophysics/galileo.html
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