Why wouldn't you want to learn about Galileo?! He's definitly an interesting intelligent person! His ideas and inventions sparked other scientists into wanting to know and learn more! He built off of the theory that Copernicus did, the Heliocentric universe which means sun centered. His discoveries were some of the first major discoveries of space. He's also well known for his experiment on the Leaning Tower of Pisa. He dropped two different weights, (weights different) off the top of the Leaning Tower of Pisa to prove that they both fall at the same speed.