Galileo Galilei is famous for his physics-related and astronomy-related observations. He built his own telescope in 1609 and used it to study the cosmos, eventually concluding that Earth’s solar system is heliocentric. G... More » Science Astronomy Universe

Italian astronomer Galileo Galilei was the inventor of the first pendulum clock, after his discovery of isochronism, which is the time that the pendulum takes to swing. Contrary to popular belief, Galileo was not the inv... More »

The Italian astronomer, physicist and mathematician, Galileo Galilei, died on January 8, 1642 at the age of 77 after suffering heart palpitations and a long fever. At the time of his death, Galileo had been under house a... More »

Galileo Galilei was charged with heresy because of his Copernican heliocentric writings, which claimed that the Earth revolved around the sun and not vice-versa. During the 15th century, the Catholic Church used Biblical... More »

Galileo Galilei is credited with discovering four of Jupiter's moons. He made this and many other discoveries in 1610 after building his first telescope. More »

Galileo Galilei, more commonly known simply as Galileo, was an Italian scientist and astronomer active during the late 1500s and early 1600s whose pioneering observations and studies have been credited as the birth of mo... More »

Galileo is famous for many things but is probably best known for discovering Jupiter's four moons. The moons around Jupiter are called "Gallilean moons." More » History Middle Ages