Johann Baptist Cysat

Johann Baptist Cysat ( Latinized Johannes Baptista Cysatus; * 1586 in Lucerne, † March 3, 1657 in Lucerne ) was a Swiss mathematician and astronomer.

Johann Baptist Cysat discovered 1619 new, physically belong together double star systems.

Life

Cysat was born the son of the Lucerne city clerk Renward Cysat. He joined in 1604 the Order of the Jesuits. At the University of Ingolstadt, he studied with Christoph Scheiner mathematics and astronomy. He was initially the employee and followed him in 1618 by a professor of mathematics. 1622 he left Ingolstadt and returned to his homeland. From 1624 to 1627 he was rector of the Jesuit College of Lucerne. After he had in the meantime been living in Spain, he was rector of the University of Innsbruck in 1637 and 1646 Rector of the Collegium Willibaldinum in Eichstätt. Finally, he again took over the rectorship the college of his native city of Lucerne.

Johann Baptist Cysat set forth telescopes and observed the comet of 1618th He was one of the first who discovered the sunspots and the mist of Orion. The astronomer Giovanni Riccioli named after him, the moon crater Cysatus.

Swell

  • Rudolf Wolf: Biographies of the cultural history of Switzerland. First cycle.. Orell, Füssli & Comp, Zurich, 1858, pp. 105-118; online.
  • JC Poggendorff: Biographic- Literary pocket dictionary of the history of exact sciences, Volume One, page 508; online at Google Books
  • Zinner, Ernst: Cysat, Johann Baptist. In: New German Biography ( NDB ). Volume 22, Duncker & Humblot, Berlin 2005, ISBN 3-428-11203-2, p 455 ( digitized ).
Cysatus (crater) Lunar craters Johann Christian Poggendorff Neue Deutsche Biographie Integrated Authority File
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