FAQ About Galileo Galilei

Galileo discovered four large moons orbiting Jupiter - Io, Europa, Ganymede, and Callisto - with his telescope in 1610. These are known as the Galilean moons. This discovery was important because it provided clear evidence that not all celestial bodies orbited the Earth, supporting the heliocentric theory. The moons are also of great interest because each possesses unique properties that offer significant insights into planetary science.