Johann Baptist Cysat, Date of Birth, Place of Birth, Date of Death

Johann Baptist Cysat

Swiss Jesuit mathematician and astronomer

Date of Birth: 12-May-1585

Place of Birth: Lucerne, Canton of Lucerne, Switzerland

Date of Death: 03-Mar-1657

Profession: astronomer, mathematician, university teacher

Nationality: Switzerland

Zodiac Sign: Taurus

Johann Baptist Cysat (Latinized as Cysatus; in French, Jean-Baptiste Cysat) (c.
1587 – March 17, 1657) was a Swiss Jesuit mathematician and astronomer, after whom the lunar crater Cysatus is named.
He was born in Lucerne, as the eighth of 14 children, to cartographer, historian and folklorist Renward Cysat (1545–1614). In 1604, Cysat joined the Jesuits and became a theology student in March 1611 in Ingolstadt.
There he met Christoph Scheiner, whom he assisted in the latter’s observation of sunspots, whose discovery would later become a matter of dispute between Galileo and Scheiner.
In 1618, Cysat was named professor of mathematics at the University of Ingolstadt, succeeding Scheiner in this position, thereby allowing him to concern himself further with astronomical problems.
Cysat became one of the first to make use of the newly developed telescope.