What did Galileo contribute to science?
A great deal of basic stuff. Firstly he established and used a scientific thinking with experimental methods at a time when the majority of academics thought that science was a part of philosophy. Secondly he began to establish the mechanics of motion of solid bodies and was able to demonstrate that the gravitational force was constant regardless of the object. His third discovery was something that others probably found but had not managed to publicise. He looked through one of the early telescopes after having improved on it, and found planets and moons that up to then were unknown. In particular he found that Jupiter had 7 moons and that our moon has craters. Finally having tried to fool the pope and failed badly, he drew attention to the theory of the solar system as distinct to the belief that the earth being the unmoving center of the universe. It took longer for this theory to be accepted as fact, and the contributions of Copernicus, Kepler and Newton were the outcome of these t
