Galileo Galilei is arguably the most important scientist to ever live. He perfected the first telescopes, turned them toward the Universe and what he discovered changed the course of history forever.

Galileo was the first person to use a telescope to observe the stars in 1609. His first astronomical discovery was that the moon had mountains, valleys and other characteristics just as does the ...

Galileo is one of the most famous scientists ever, both for his groundbreaking discoveries and his willingness to stand by his theories in opposition to conventional thought. His persecution by the ...

The language of math By his own reckoning, Galileo's most important contribution involved neither the astronomical discoveries that immortalized his name, nor his published defense of Copernicus ...

Each discovery drew Aristotle's system further into question and lent ever more support to the dangerously revolutionary view that Galileo had privately come to hold—set out just a half-century ...