“Truth is the daughter of time, and I feel no shame in being her midwife.” – Johannes Kepler.
Johannes Kepler Biography
Johannes Kepler was born on 27 December 1571 in Well der Stadt, a small town in what is now the Stuttgart region of Germany. He was the fourth child of Heinrich Kepler, a mercenary who left the family when Johannes was only five and is thought to have died in the eighty years war. His mother, Katharina, was an innkeeper’s daughter. She did her best to allow Johannes to experience the wonders of nature, and it was probably because of this that he developed a love for astronomy. It was she who took him to a high place in order for him to see the great comet of 1577 better and it was probably she that called him outside in 1580, when he was nine, to look at the lunar eclipse.
(adsbygoogle = window.adsbygoogle || []).push({});
In 1589, after leaving grammar school, Kepler attended the University of Tübingen, and proved himself to be a skillful mathematician. Under Michael Maestlin, the university’s professor of mathematics, he learned about planetary motion and became a fan of the Copernican system which put the Sun, rather than the Earth at the center of the universe.
Kepler had wanted to become a minister, having studied both philosophy and theology whilst at university, and having attended seminary at Maulbronn before that. However, he was recommended as a teacher of mathematics and astronomy at a school in Graz, a position which he took up at the age of 23 in April 1594. Whilst teaching at Graz, Kepler claimed to have an epiphany on 19 July 1595 in which he believed that he was shown God’s geometrical plan for the universe. His experiments led him to publish a book called Mysterium Cosmographicum in 1596. A second edition of which was published in 1621 included all of his observations and corrections since the first edition was published some quarter of a century earlier.
The year before he published Mysterium Cosmographicum, Johannes Kepler was introduced to Barbara Müller, a 23-year-old, twice-widowed mother of one, and they began courting. The couple was married on 27 April 1597. They had two children who died in infancy, but three more children would follow, a daughter called Susanna and two sons, Friedrich and Ludwig.
Following the publication of Mysterium Cosmographicum, Kepler formulated grand plans to expand on the work, by publishing four more books dealing with the sun, stars, planets and their motions, the physical nature of the planets and the effects of the heavens on the earth. In order to help him with his work, he began correspondence with a number of eminent astronomers, to whom he had previously sent copies of his book. One such person was Tycho Brahe, who was particularly critical of the use, in Kepler’s work, of the inaccurate data supplied by Copernicus. Never the less, the two started regular correspondence. Eventually, and amidst, growing religious tension in Graz which was threatening his employment, Kepler accepted an invitation from Tycho to visit him in Prague.
Kepler arrived in Benátky nad Jizerou, about 35km outside of Prague, where Tycho Brahe was building a new observatory, on 4 February 1600. He met Tycho and his assistants and stayed for the next couple of months as a guest, and as Tycho began to trust Kepler, he allowed him more and more access to his data. Following an argument, however, over negotiations for a more formal arrangement of employment with Tycho, Kepler left and headed to Prague. The pair soon came to an arrangement though and Kepler returned to Graz to collect his family. Political and religious tensions in Graz meant that he could not return immediately to Brahe, but when he refused to convert to Catholicism he was banished, and he and his family headed to Prague, where from 1601, he was supported by Tycho Brahe but on 24 October 1601,