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1571 – Kepler – bio

1571 – Kepler – bio

Born in 1571 in the Stuttgart region of Germany, Johannes Kepler was a mathematician and astronomer. Kepler became the first published defender of the heliocentric theory of Copernicus. He described planetary orbits as platonic solids and then realized that the orbits are eliptical.

Kepler studied the golden ration and wrote this about it:

“Geometry has two great treasures: one is the Theorem of Pythagoras; the other, the division of a line into extreme and mean ratio. The first we may compare to a measure of gold; the second we may name a precious jewel.”

He studied optics including the pin-hole camera, refraction within the eye, and depth perception using stereo vision. He laid the foundation for integral calculus, explained that tides are caused by the moon, suggested that the Sun rotates about its axis and coined the term, “satellite”.

-0575 – Pythagoras
-0310 – Aristarchus
0085 – Ptolemy
1473 – Copernicus

1546 – Brahe
1564 – Galileo
1608 – telescope

1642 – Newton

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