- Alexius Sylvius Polonus
Sylvius studied at the Jesuit College in
Kalisz. The Belgian Jesuit Charles Malapertorganized there the observations of sunspots, in which Sylvius took part. They used early telescopes obtained from Christoph Scheinerin Ingolstadt.
In 1617 Sylvius accompanied Malapert on his return to the
Southern Netherlands, where they both spent twelve years at the University of Douai. They performed observations of sunspots with better astronomical instruments. These Sylvius invented and constructed himself.
In 1630, Malapert was called to
Spainto occupy a newly created chair in the Jesuit Colegio Imperial de Madrid. However, he fell ill during the journey and died shortly after entering Spain. Sylvius continued on, and subsequently taught at the Colegio Imperial, building the university a planetariumin 1634.
Sylvius left Spain for the Southern Netherlands in 1638, where he stayed in the Benedictine monastery at
Anchin, for which he may have constructed its planetarium.
Sylvius was in Poland by 1649. In 1651, he published a work on calendariography.
*en icon [http://adsabs.harvard.edu/abs/1967VA......9...11B Alexander Birkenmajer, Alexius Sylvius Polonus (1593 ca. 1653), a little-known maker of astronomical instruments]
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