(Würtemburg, now Germany, 1571, Regensburg, id., 1630) Astronomer, German mathematician and physicist. Son of a mercenary who served in the army of money Duke of Alba and disappearedinto exile in 1589 - and a mother suspected of practicing witchcraft, Johannes Kepler exceeded the aftermath of a sordid and unhappy childhood thanks to his tenacity and intelligence.
Afterattending seminars and Maulbronn Adelberg, Kepler entered the University of Tübingen (1588), where he studied theology and was also a disciple of the Copernican Michael Mästlin. In 1594, however, interruptedhis theological career by accepting a position as professor of mathematics at the Protestant seminary in Graz.
Four years later, a few months after a marriage of convenience, the edict of ArchdukeFerdinand against Protestant teachers forced him to leave Austria and in 1600 he moved to Prague invited by Tycho Brahe. When he died suddenly the following year, Kepler succeeded him as ImperialMathematician to Rudolph II, in order to end the astronomical tables started by Brahe and as advisor astrological function that often resorted to living.
In 1611 his wife died and one of his three childrenshortly after after the death of the Emperor and the accession of his brother Matthias, was appointed professor of mathematics at Linz. Kepler lived there until, in 1626, the economic and the climateof instability caused by the Thirty Years' War led him to Ulm, where he oversaw the printing of the Tables Rudolphine, Brahe initiated and completed in 1624 by himself using laws on planetarymovements that set.
In 1628 went to service A. von Wallenstein, in Sagan (Silesia), who promised, in vain, to indemnify him for the debt owed to him by the Crown over the years. A month before he died, avictim of fever, Kepler had left Silesia in search of a new job.
The first step in the work of Kepler, developed during his years in Graz, focused on the problems related to the planetary orbits, as...