After building his first telescopes, Galileo demonstrated the new instrument ... That discovery helped support a heliocentric model of the solar system — a belief so radical at the time that ...

His observations of the night sky in the early 1600s confirmed a new model of ... the solar system, Galileo was working on practical problems. And his early goals for the telescope weren't so ...

Galileo Galilei famously stood trial for his insistence—based on astronomical observations through his telescopes—that the Copernican model of the Solar System was correct. The Earth revolved ...

When Italian astronomer Galileo Galilei heard rumors of the first practical telescope at the beginning of the 17th century, he was quick to craft his own version and turn it toward the heavens.

By the 1590s, he was already drawn to the Copernican model of the heavens ... This specialized knowledge paid off when Galileo first aimed his telescope at the Moon, although he initially ...

He mentally envisioned the first refracting telescopes without ever doing anything about them. You know — he was a busy guy. Galileo’s thoughts on optics, however, led to world-changing events ...