ocr: HELIOCENTRIC WORLD VIEW GALILEI AND THE INVENTION OF THE TELESCOPE The Italian natural historian, philosopher and pioneer of empirical science, Galileo Galilei (1564 1642) built his first telescope in 1609 following a new design brought from Holland. With his telescope Galilei discovered the four biggest moons of Jupiter, which he described in great detail in his book Sidereus Nuncius'. In addition he observed the phases of Mercury and Venus and discovered sunspots. Galilei was the first to discover the sunspots with the help of his telescopes. By following the movement of these spots Galilei ...
