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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.
The story of Galileo's telescopic observations illustrates how a tool for seeing and collecting evidence can dramatically change our understanding of the cosmos. Early telescopes were primarily used for making Earth-bound observations, such as surveying and military tactics.
Jul 13, 2016 · In 1610, Italian astronomer Galileo Galilei looked up at the heavens using a telescope of his making. And what he saw would forever revolutionize the field of astronomy, our understanding of...
Feb 24, 2009 · When Galileo pointed his telescope at Jupiter, the largest planet in our solar system, he made a startling discovery. The planet had four "stars" surrounding it. Within days, Galileo figured out that these "stars" were actually moons in orbit of Jupiter.
Mar 13, 2018 · Galileo turned his telescope to the Milky Way and discovered that it consisted of a vast number of stars, each too faint to be seen individually with the naked eye. When viewed from Earth these stars are so closely packed together they appear to be clouds.
Apr 3, 2014 · Galileo was an Italian scientist and scholar whose inventions included the telescope. His discoveries laid the foundation for modern physics and astronomy.
Jun 10, 2024 · Galileo's telescopes. Two of Galileo's first telescopes; in the Museo Galileo, Florence. Galileo's illustrations of the Moon. Galileo's sepia wash studies of the Moon, 1609; in the Biblioteca Nazionale, Florence. (more) Galileo Galilei: Copernican system.
The unremarkable-looking object is in fact one of the most important artifacts in the history of science: it's one of only two surviving telescopes known to have been made by Galileo Galilei,...
Jul 23, 2010 · Galileo invented an improved telescope that let him observe and describe the moons of Jupiter, the rings of Saturn, the phases of Venus, sunspots and the rugged lunar surface.
Galileo Galilei did not invent the telescope but was the first to use it systematically to observe celestial objects and record his discoveries. His book, Sidereus nuncius or The Starry Messenger was first published in 1610 and made him famous.
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