- Lesson 101: Johannes Kepler
- Lesson 102: Galileo Galilei
- Lesson 103: The Slide Rule
- Lesson 104: John Napier
Johannes Kepler
Kepler is best known for his three planetary laws of motion. His first two laws are below:
- The planets moved in elliptical orbits, as opposed to circular orbits.
- The closer to the sun the planet is, the faster the speed.
Galileo Galilei
Galileo’s father wanted him to be a doctor. Galileo had accidentally gone into a lecture on geometry, and convinced his father to let him study math and philosophy. He observed a comet and a lunar eclipse, and that inspired him to do astronomy. He made his own version of the telescope once it came out.
The Slide Rule: invented by John Napier
John Napier saw a problem with the ability to do multiplication and division, so invented logs. Logs could be worked with by using the slide rule. John Napier would think about a problem and an invention that could help solve it. Unlike some people, he would make the invention, not just think about it.