Source: NOVA: "Galileo's Battle for the Heavens" This resource was adapted from NOVA: "Galileo's Battle for the Heavens." As early as the 1300s, eyeglasses made from convex, or outward-curving, lenses ...

The Renaissance physicist, mathematician, philosopher and astronomer Galileo Galilei is perhaps best known for his work on gravity, relative motion and the discovery of numerous astronomical objects ...

PHILADELPHIAPHILADELPHIA — Though it looks like a cardboard tube that got left out in the rain, it’s a priceless instrument whose owner changed the world. The mottled brown cylinder on display at The ...

Galileo's observations of the night sky in the early 1600s confirmed a new model of the universe, in which the Earth orbited the sun—and not the other way around, as his contemporaries believed. But ...