Physicists Biographies

Johannes Kepler

Johannes Kepler was a very important German astronomer. His works brought understanding about the structuring of the Solar System.

Kepler’s three laws explain how the “ballet” of the planets around the Sun occurs *
Johannes Kepler was born in December 1571 in Weil der Stadt, Worttemburg, Germany. The life of this celebrated scholar was never easy. He was from a poor family and was in very poor health. He was the son of a mercenary who abandoned the family when he was five years old and a woman, Katharina Guldenmann, who was involved in mysticism. In 1612, Katharina was tried, but acquitted, on charges of witchcraft.

Kepler graduated from the University of Tubingen and, in 1596, became professor of mathematics and astronomy at the school of Graz, at which time he wrote his first book Mysterium Cosmographichum – Mysterium Cosmographic , a book in which the ideas of a heliocentric universe proposed by Nicolaus Copernicus were defended.

Due to political and religious pressures suffered in Graz, Kepler moved to the city of Prague around 1600, where he became an assistant to the Danish astronomer Tycho Brahe . After a few months of turbulent coexistence between the two brilliant astronomers, Brahe died and left Kepler years of notes and astronomical data. Two days after Brahe’s death, Johannes Kepler was appointed Astronomer Royal.

In 1609, Kepler published the book Astronomia Nova, in which he explained how the planets revolve around the Sun. Today these proposals are called Kepler’s 1st and 2nd laws. In 1612, again due to political and religious pressures, Kepler moved to Linz and, in 1619, he published the book Harmony of the World, in which he explained the relationship between the time of revolution of the planets around the Sun and the radius of their orbits. , a relationship known today as Kepler’s 3rd law . In the year 1630, Johannes Kepler died in Bavaria, Germany.

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