home *** CD-ROM | disk | FTP | other *** search
- 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 could deduce that the Sun rotates around its axis in 27 days.
-