what is his birthplace?
In the Free Imperial City of Weil der Stadt
Johannes Kepler
Kepler was born on 27 December, the feast day of St John the Evangelist, 1571, in the Free Imperial City of Weil der Stadt (now part of the Stuttgart Region in the German state of Baden-Württemberg, 30 km west of Stuttgart's center). Hi
io and europa the inner two of jupiter's four largest moons They include also Ganymede, and Callisto what are these four moons collectively known as? The Galilean moons who discovered them? Galileo Galilei are these moons visible from earth? Yes through a telescope are there different type of this instrument? Yes, reflecting telescope, radio telescopes  and infrared telescopes who invented it? Hans Lippershey in what kind of research is the first type that you mentioned used? In astronomy as well as for terrestrial viewing are there any variations of this type of instrument? Yes the Keplerian telescope who discovered it? Johannes Kepler
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Johannes Kepler [SEP] Early years
Under the instruction of Michael Maestlin, Tübingen's professor of mathematics from 1583 to 1631, he learned both the Ptolemaic system and the Copernican system of planetary motion. He became a Copernican at that time. In a student disputation, he defended heliocentrism from both a theoretical and theological perspective, maintaining that the Sun was the principal source of motive power in the universe. Despite his desire to become a minister, near the end of his studies, Kepler was recommended for a position as teacher of mathematics and astronomy at the Protestant school in Graz. He accepted the position in April 1594, at the age of 23.