Galileo Galilei had five siblings. He was the first of six children born to Vincenzo Galilei, a musician, and Giulia Ammannati. Galileo was born on Feb. 15, 1564, in Pisa, Italy. More »

While he did not invent the telescope, Galileo modified one of the devices before discovering a number of planets and moons, including Venus, which inspired a scientific revolution. His contention that Copernicus was cor... More »

Galileo Galilei was a scientist who made many discoveries in astronomy and physics, such as four of the moons of Jupiter, the phases of Venus, Saturn's rings and that an object accelerates at a constant rate. Although Ga... More »

Galileo Galilei was an Italian genius that is famous for many things, most notably for his contributions to astronomy. He is responsible for discovering Jupiter's four moons, advancing telescope technology and declaring ... More »

Galileo Galilei was a famous Italian astronomer, engineer, physicist, philosopher and mathematician who lived between 1564 and 1642. He advocated many advances in science and astronomy and played a key role in the Scient... More »

Galileo lived in several places over the course of his life, beginning in Pisa, Italy, until he was 8 when his family moved to Florence, then he later lived in Padua before moving back to Florence in the Tuscany area. Th... More »

Galileo was a direct influence on Newton's Law of Motion, which is directly connected to Galileo's concept of inertia. Newton's law of motion is often called the law of inertia. More »