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telescope. Galilean telescope, instrument for viewing distant objects, named after the great Italian scientist Galileo Galilei (1564–1642), who first constructed one in 1609. With it, he discovered Jupiter’s four largest satellites, spots on the Sun, phases of Venus, and hills and valleys on the Moon. It consists of a convergent lens as ...
- The Editors of Encyclopaedia Britannica
Early telescopes were primarily used for making Earth-bound observations, such as surveying and military tactics. Galileo Galilei (1564-1642) was part of a small group of astronomers who turned telescopes towards the heavens. After hearing about the "Danish perspective glass" in 1609, Galileo constructed his own telescope.
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- History of Galileo’s Telescope
- What Galileo Observed
- Galileo’s Telescope Today
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Galileo’s telescope was the prototype of the modern day refractor telescope. As you can see from this diagram below, which is taken from Galileo’s own work – Sidereus Nuncius (“The Starry Messenger”) – it was a simple arrangement of lenses that first began with optician’s glass fixed to either end of a hollow cylinder. Galileo had no diagrams to wo...
Naturally, Galileo’s telescope had some historical antecedents. In the late summer of 1608, a new invention was all the rage in Europe – the spyglass. These low power telescopes were likely made by almost all advanced opticians, but the very first was credited to Hans Lippershey of Holland. These primitive telescopes only magnified the view a few t...
One fine Fall evening, Galileo pointed his telescope towards the one thing that people thought was perfectly smooth and as polished as a gemstone – the Moon. Imagine his surprise when found that it, in his own words, was “uneven, rough, full of cavities and prominences.” Galileo’s telescope had its flaws, such as a narrow field of view that could o...
Today, over 400 years later, Galileo’s Telescope still survives under the constant care of the Istituto e Museo di Storia della Scienza(renamed the Museo Galileo in 2010) in Italy. The Museum holds exhibitions on Galileo’s telescope and the observations he made with it. The displays consist of these rare and precious instruments – including the obj...
Learn how Galileo Galilei invented and improved his own telescope, the prototype of the modern refractor telescope, and used it to make groundbreaking observations of the heavens. Find out what he saw with his telescope, how it was preserved today, and what has become of it today.
Mar 13, 2018 · Learn how Galileo Galilei invented and used the first telescope to make groundbreaking astronomical discoveries. Find out how a Galilean telescope works and what Galileo observed with it.
Aug 18, 2023 · The astronomical telescope became one of the most important of all instruments during the Scientific Revolution when figures like Galileo (1564-1642) and Isaac Newton (1642-1727) used it to provide evidence for bold new theories about the heavenly bodies and the nature of the universe itself. Eyepiece of Galileo's Telescope.
- Mark Cartwright
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Apr 3, 2014 · Galileo was an Italian astronomer, mathematician, physicist and philosopher who made pioneering observations of nature with a telescope. He supported the Copernican theory of the sun-centered solar system and was accused by the church for heresy. Learn more about his life, discoveries, books and legacy.
The Dutch telescopes magnified images by 3 times; Galileo's telescopes magnified them by 8 to 30 times. At the time, astronomy, like much of science, remained under the spell of Aristotle.
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