The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

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.

Shortly after he began producing his binoculars, news of the telescope reached Galileo. These days, the telescope is mostly closely associated with the night sky, but it's also useful on land and ...

Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...

Nearly 415 years ago to the day astronomer Galileo Galilei discovered the moons surrounding Jupiter looking through his ...

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.

3 min read The Hubble Space Telescope was designed to free astronomers of a limitation that has plagued them since the days of Galileo—Earth's atmosphere. Shifting air pockets in the atmosphere ...

There’s too much waiting for you in the universe above our heads. Galileo said it best: telescopes “reveal the invisible.” You might be tempted to put off using your new telescope until it ...

The Galileo probe expanded on our knowledge of Jupiter's moon, Io, showing us just how hot and hellish the Jovian satellite ...

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.

Galileo made himself one of the world's first telescopes and discovered the moons of Jupiter. He supported Copernicus' theory that the Earth revolved around the Sun. This brought him in conflict ...