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Johann Kepler was born at Weil der Stadt, in the Wurttemberg, in 1571. Delicate and Johann Kepler was born at Weil der Stadt, in Wurttemberg, in 1571. Delicate and sickly, he commenced an ecclesiastical career. At the University of Tubingen, Michael Mastlin (1550-1631) introduced him to Copernican theory. In 1594, Kepler moved to Graz. In 1596, he published The Secret of the Cosmos, in which he tried to relate planetary spheres to the five geometrical regular solids. Due to the counter-Reformation, Kepler was compelled to leave Graz. He found shelter in Hungary, and then went back to Graz, although he did not convert to Catholicism. In 1600, Kepler went to Tycho at the Castle of Benatky, near Prague, and became his assistant. When Tycho died the next year, Kepler succeeded him as Imperial Mathematician. In 1611, his seven year old son, and then his wife, Barbara Muller, died, and in the same year, as a protestant, Kepler had to leave Prague. In 1612, he was nominated the official Mathematician in Linz (now in Austria), and in the following year, he married Susanne Renttinger. In 1615, Kepler's mother was charged with witchcraft. Kepler left Linz in 1626; he moved to Ulm, and, in 1628, to Sagan. In 1630, he went to Regensburg, to demand payment of the profits of his Rudolphine Tables. He died in November of the same year.
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Johann Kepler (1571-1630), Gioviana Collection, Uffizi Gallery, Florencec. 1630; copia XIX sec.
[IMSS: inv. 3571-19]