ABSTRACT
Astronomer, instrument maker, and mathematician, he was born in Joachimsthal and studied at the University of Wittenberg, probably under Caspar Peucer (1525-1602). In 1562 he moved to Nuremberg, where he made astronomical instruments. In 1569 he became closely associated with Georg Joachim Rheticus (1514-1574). In 1571 Peucer and the university senate called him to Wittenberg, where he taught higher mathematics until 1576, when he assumed a position at the newly founded Altdorf Academy near Nuremberg, where he taught astronomy, mathematics, and instrument making until his death.
