A Galilean telescope is, in essence, a tube with two lenses placed at either end. The eyepiece is a plano-concave lens, which is flat on one side and curved inward on the other.

Galileo and the Telescope. By David Levin; Posted 05.19.11; NOVA; Galileo's observations of the night sky in the early 1600s confirmed a new model of the universe, in which the Earth orbited the ...

The Kepler Space Telescope, named for astronomer Johannes Kepler, was NASA's first exoplanet hunting telescope. It launched on March 6, 2009, with the goal of observing more than 100,000 stars in ...

Galileo's Telescope. Galileo is often incorrectly credited with the creation of a telescope. (Hans Lippershey applied for the first patent in 1608, but others may have beaten him to the actual ...

Galileo made telescopes no more than about one and half meters long but, by 1656, Christiaan Huygens had made a 100 power telescope that was 7 meters (23 feet) long, with an aperture of about 150 ...

Galileo’s telescope (right) uses lenses to magnify about 21 times but gives very restricted views so that he was able to see only about a third of the Moon at once. SSPL via Getty Images.

Galileo’s first crude telescope only magnified objects a few times, barely enough to change their appearance. But the modified telescope he swung toward Jupiter that January evening had a very ...

While Galileo didn't invent the telescope, he is the person most inextricably tied to its use and development. The field of optics had become so established, and the principles behind Lippershey's ...