Tycho Brahe no relation University of Tübingen
Education
In 1565, when Michael was around 15 years old, he was sent to the nearby Klosterschule in Königbronn. In 1567, Michael transferred to a similar school in Herrenalb. Upon finishing his education at Herrenalb, Maestlin enrolled in university, matriculating on 3 December 1568 at the University of Tübingen. When Maestlin entered the university in 1569 he did so as one of the beneficiaries of a scholarship from the duke of Württemberg. He studied theology at the Tübinger Stift, which was founded in 1536 by Duke Ulrich von Württemberg, and was regarded as an elite institution of education. He obtained his Baccalaureate in 1569 and his master's degree in 1571. After receiving his masters degree Maestlin remained at the university as a student in theology and as a tutor in the theological seminary church located in Württemberg. In letters sent to Maestlin regarding his qualifications, it was revealed that he graduated summa cum laude and ranked third in his graduating class of twenty. During the time he spent on earning his master's degree, Maestlin studied under Philipp Apian. It is not certain, but it is believed that Apian taught courses on Frisius's Arithmetic, Euclid's Elements, Proclus's Sphera, Peurbach's Theoricae Novae Planetarus, and the proper use of geodetic instruments. Apian's teachings evidently influenced Maestlin's paper on sundials as the contents of this essay involve elements of structured celestial globes and maps.In 1584, Maestlin was named Professor of Mathematics at Tübingen. He was elected Dean of the Arts Faculty for the following terms: 1588-89, 1594–95, 1600–01, 1607–09, 1610–11, 1615, 1623, and 1629. Maestlin taught trigonometry and astronomy. It was very likely that he used his book Epitome Astronomiae in his lectures.In 1576 Maestlin had been sent to be a deacon at the Lutheran church in Backnang, a town about 30 kilometers Northwest of Göppingen. While there, he observed a comet that appeared in 1577. Tycho Brahe in Denmark observed the same comet, and from observations of its parallax, both Tycho and Maestlin were able to determine that the comet must be above the moon, contrary to the astronomical theories of both Aristotle and Ptolemy. Maestlin concluded that, in the Copernican system, the comet must lie in a region between the sphere of Venus and that of the Earth and Moon. Maestlin served as the Duke's chief scientific adviser from 1577–1580.Career
Maestlin studied theology, mathematics, and astronomy/astrology at the University of Tübingen—the Tübinger Stift. (Tübingen was part of the Duchy of Württemberg.) He graduated as magister in 1571 and became in 1576 a Lutheran deacon in Backnang, continuing his studies there.In 1580 he became a professor of mathematics, first at the University of Heidelberg, then at the University of Tübingen, where he taught for 47 years from 1583. In 1582 Maestlin wrote a popular introduction to astronomy. While teaching at the university Maetslin tho a Copernican taught traditional Ptolemaic astronomy in his courses. However, Maestlin did present Copernican's heliocentric astronomy to his advanced students.Among his students was Johannes Kepler (1571–1630) who considered Maestlin not only a teacher, but also a lifelong mentor. Although he primarily taught the traditional geocentric Ptolemaic view of the solar system, Maestlin was also one of the first to accept and teach the heliocentric Copernican view. Maestlin corresponded with Kepler frequently and played a sizable part in his adoption of the Copernican system. Galileo Galilei's adoption of heliocentrism was also attributed to Maestlin.The first known calculation  of the (inverse) golden ratio as a decimal of "about 0.6180340" was written in 1597 by Maestlin on a letter he got from to Kepler about Kepler triangleMichael Maestlin was one of the very few astronomers of the sixteenth century that fully adopted the Copernican hypothesis, that proposed that the Earth was a planet and that it moved around the sun. 1570 he acquired an edition of his main work De revolutionibus orbium coelestium (his edition with many commentaries is in Schaffhausen). Maestlin reacted to the thought of distant stars spinning around a fixed earth every 24 hours and taught everything that he could about Copernicus to Kepler.In November 1572 Maestlin and many others around the world witnessed a strange light in the sky that we now know was a galactic supernova. Maestlin attempted to explain this phenomenon in his tract entitled Demonstratio astronomica loci stellae novae, tum respectu centri mundi, tum respectu signiferi & aequinoctialis. This tract of Maestlin's was a short mathematical and  astronomical appendix detailing the nova and was published in Tübingen in March or April of 1573. This nova was called the Nova of Cassiopeia and was the first galactic supernova to be observed in Europe. Maestlin's treatise attracted the attention of Tycho Brahe, who reproduced it in  its entirety, along with his criticism, in one of the best known publications on the nova, in his posthumously printed Astronomiae instauratae progymnasmata. Maestlin's treatise is available in manuscript format in Stuttgart and  in Marburg.The programme of Maestlin's treatise of 1573 over the supernova was practically identical to that of Tycho Brahe's longer treatise De stella nova, which published in the same year two or three months later. Tycho's Progymnasmata, was also nearly identical to Maestlin's treaties, which was finished latter in 1592 but published only in 1602, a year after Tycho Brahe's death.
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