jan 1, 1609 - Astronimia Nova
Description:
Johannes Kepler use Tycho Brahe’s data, Kepler focused his work on the orbit of Mars in the book. In Astronomia Nova, he concluded the first two of his laws of planetary motion. Kepler’s First Law of Planetary Motion says that each planet orbits the sun on an elliptical path, with the sun as one focus of the ellipse.Added to timeline:
Date:
jan 1, 1609
Now
~ 417 years ago