Johannes Kepler publishes his first two laws of planetary motion showing that planets move in elliptical orbits around the sun. (1 jan 1609 ano – 1 nov 1609 ano)

Descrição:

Johannes Kepler's laws explain how planets revolve around the Sun in elliptical orbits, how no matter where in its orbit they are, they cover the same amount of space in the same amount of time, and how their orbital periods are proportional to the size of their semi-major axes.

source: https://www.physicsclassroom.com/class/circles/Lesson-4/Kepler-s-Three-Laws

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