Galileo Galilei was a ground-breaking astronomer who discovered, among other things, several of Jupiter’s moons. To explore the skies, he relied on a telescopes that magnified objects with ...

Contrary to what many people think, Galileo did not invent the telescope. In this video segment adapted from NOVA, the Italian physicist and mathematician improves on an existing spyglass design ...

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 ...

Telescopes have come a long way since Galileo's first invention 400 years ago. The most sophisticated models today let you see stars, nebulae and galaxies with just the push of a button. Don't ...