18.1.13: Kepler, Johannes

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Image of an artist's rendition of Danish Astronomer Tychos Brahe. — Public Domain

Tycho Brahe made numerous measurements of the positions of astronomical objects until his death in 1601. His measurements were accurate to better than 1/100 of a degree.

Johannes Kepler was Tycho’s assistant. Kepler tried to obtain Tycho’s data to fit the Copernican Heliocentric Solar System Model. (Kepler’s and Tycho did not get along. ) But Tycho’s data did not exactly work for a Heliocentric Solar System! So Kepler looked for a new model, and from that he developed Kepler’s Laws.

https://phys.libretexts.org/Bookshel...er_and_Galilei

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