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Today is Johannes Kepler's Birthday!
Happy Birthday

Born:  December 27, 1571
in Weil der Stadt. Württemberg
Holy Roman Empire, now Germany

Died:  November 15, 1630 
in Regensburg, now Germany

Kepler was seeking The Harmony of the World  when he published these illustrations in 1619.

Kepler and Brahe are both honored in Prague.  For a time they even lived on the same street.