- ad 1584 rules pendulum (Pendulum) or rules you free pendulum clock
- ad 1585 published a book named that Kydrostatic. Balance Centre of and Gravity
- Ad1591 prove the theory of Aristotle that objects of lightweight that wrong. In fact, the object will fall to the ground at the same time
-. Development of a telescope to more efficiently. And can shine on the universe star
.- find the surface of the moon
- found that many star types which have different characteristics, including planets and stars
- see the Milky way. (Milky Way)
- host of Jupiter to the sun to 4
.- Saturn's ring, which rules that have to 3 mouth color
-. Found that the surface of Venus is similar to the moon
- find end on the sun (Sun Spot)
- found the planet 3 tail lights.