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 ...

Galileo's first telescope offered limited magnification and a narrow field of view. He eventually succeeded in magnifying an object about 30 times, but realized that enlarging it any ...

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 ...

August 25, 2009. Exactly 400 years ago today, Galileo unleashed what may be his most lasting contribution to science: the telescope. As both the International Year of Astronomy and Google’s home ...

The Kepler Space Telescope, named for astronomer Johannes Kepler, was NASA's first exoplanet hunting telescope. It launched ...

NASA's Hubble Space Telescope captured the rare occurrence of three of Jupiter's largest moons racing across the banded face of the gas-giant planet: Europa, Callisto, and Io on Jan. 24, 2015.

It’s the 400th anniversary of the first use of an astronomical telescope by Galileo. In late August 1609, Galileo Galilei demonstrated his 8-power hand-built telescope to Venetian notables.