Johann Baptist Cysat

Johann Baptist Cysat ( Latinized Johannes Baptista Cysatus ; * 1586 or March 12, 1587 in Lucerne ; † March 3, 1657 ibid) was a Swiss mathematician and astronomer.

Johann Baptist Cysat discovered new, physically related binary star systems in 1619 .

Life

Cysat was born as the son of the Lucerne town clerk Renward Cysat . He joined the order of the Jesuits in 1604 . At the University of Ingolstadt , he studied mathematics and astronomy with Christoph Scheiner . He was initially his employee and followed him in 1618 as a professor of mathematics. In 1622 he left Ingolstadt and returned to his homeland. From 1624 to 1627 he was rector of the Jesuit College of Lucerne . After living in Spain for a while, he became rector of the University of Innsbruck in 1637 and rector of the Collegium Willibaldinum in Eichstätt in 1646 . Finally he took over the rectorate of the college of his native Lucerne.

Johann Baptist Cysat made telescopes and observed the comet of 1618 . He was one of the first to describe the sunspots and the Orion Nebula . The astronomer Giovanni Riccioli named the lunar crater Cysatus after him .

swell

Rudolf Wolf: Biographies on the cultural history of Switzerland. First cycle . Orell, Füssli & Comp., Zurich 1858, pp. 105-118 (online) .
J [ohann] C [hristian] Poggendorff : Biographical-literary concise dictionary for the history of exact sciences , first volume, p. 508 (online at Google Books) .
Ernst Zinner : Cysat, Johann Baptist. In: New German Biography (NDB). Volume 3, Duncker & Humblot, Berlin 1957, ISBN 3-428-00184-2 , p. 455 ( digitized version ).
Hanspeter Marti: Cysat, Johann Baptist. In: Historical Lexicon of Switzerland .

Web links

Publications by and about Johann Baptist Cysat in VD 17 .

Individual evidence

^ Rita Haub : Sun, Moon and Stars. Jesuits as discoverers (= Topos-plus-Taschenbücher, Volume 642), Kevelaer 2008, ISBN 978-3-8367-0642-1 . ( limited preview in Google Book search)

personal data
SURNAME	Cysat, Johann Baptist
ALTERNATIVE NAMES	Cysatus, Johannes Baptista (full name)
BRIEF DESCRIPTION	Swiss mathematician and astronomer
DATE OF BIRTH	1586 or March 12, 1587
PLACE OF BIRTH	Lucerne
DATE OF DEATH	March 3, 1657
Place of death	Lucerne

[1] Rita Haub : Sun, Moon and Stars. Jesuits as discoverers (= Topos-plus-Taschenbücher, Volume 642), Kevelaer 2008, ISBN 978-3-8367-0642-1 . ( limited preview in Google Book search)