logo

Video encyclopedia

25/08/1609 Galileo Galilei demonstrates his first telescope

5:42

The Day Galileo Changed The Universe

12:01

Telescopes: Crash Course Astronomy #6

2:52

Galileo - Mini Biography

Galileo demonstrated one of his early telescopes, with a magnification of about 8 or 9, to Venetian lawmakers. His telescopes were also a profitable sideline for Galileo, who sold them to merchants who found them useful both at sea and as items of trade.
    • Essentials 

    • Personal 

    • Students 

    • Influenced 

    • Other blind academics 

    • Inventions or discoveries 

    • Also related