Kepler's House in Linz
Four hundred years ago yesterday (May 15, 1618) Johannes Kepler discovered the simple mathematical rule governing the orbits of the solar system's planets, now recognized as Kepler's Third Law of planetary motion. At that time he was living in this tall house on The Hofgasse, a narrow street near the castle and main square of the city of Linz, Austria. The conclusive identification of this residence (Hofgasse 7) as the location of the discovery of his third law is a recent discovery itself. Erich Meyer of the Astronomical Society of Linz solved the historical mystery. 
Image Credit & Copyright: Erich Meyer (Astronomical Society of Linz)
Text: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)

Mona Evans
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