1. Johannes Kepler
Zhuoqi Gao

2. 1. 2. 3. life experiences scientific achievements CONTENTS
influences on the research field

3. Life experiences Johannes Kepler (1571-1630) German
mathematician astronomer astrologer （占星家）
tough life

4. Scientific achievements
Astronomical research
Laws of planetary motion
1, The orbit of a planet is an ellipse with the Sun at one of the two foci.
2, A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
3, Square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit

5. Scientific achievements
Optical research
Pinhole image 2
S∝ 1/cd
Kepler telescope
concave convex
凸 凹

6. Influences Lay the foundation of astronomy
Promote the discovery of the Law of gravity
Founder of optics

7. Thx All images from www.googleimages.com
Reference from:
(Accessed: 11 July)