The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...
Making the far near The invention that set the stage for the ... "objective" lens—the convex lens at the far end of the telescope—Galileo ground a lens larger than he needed, for example.
Hubble’s work pushed the field of astronomy forward, starting with his paper demonstrating that some objects exist outside our galaxy.
Here, Galileo took this crude device with ... to overcome the problem of chromatic aberration: the invention of the reflecting telescope described by James Gregory and built in a different form ...
Astronomical changes were brewing at the end of 1609. With the telescope having been recently invented, Galileo started playing around with it, making his own improvements to the new gadget.
Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...
On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he looked at Jupiter through his telescope, he saw what he thought were three tiny ...
Jim Al-Khalili explores the extraordinary story of six remarkable inventions: The Aeroplane, The Car, The Rocket, The Smartphone, The Telescope, The Robot. They are familiar, yet hidden within ...
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