The investigation of light and optical properties stretches back centuries, at least to the ancient Greeks, Egyptians, and Mesopotamians. In fact, even artificial lenses date back to as early as ...

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of Galileo ... captured images of many ancient galaxies, in all ...

and it gets its name from the leader of the ancient Roman gods. Even though it had been observed in the sky since prehistory, it wasn’t until Galileo came along with his trusty telescope that ...

Second, you soon want a bigger telescope. Galileo, who first trained a telescope on the night sky 400 years ago this fall, pioneered this two-step program. First, he marveled at what he could see.

Galileo changed the way we study motion. He backed experimentation as a means of uncovering the secrets of nature. And his discoveries with the telescope changed our understanding of the universe.