that the comet was located beyond the Moon, contradicting the astronomical theories of Aristotle and Ptolemy. Maestlin independently arrived at a similar conclusion and, within the framework of the Copernican system, proposed that the comet resided in a region between the spheres of Venus and the Earth-Moon system. From 1577 to 1580, Maestlin also served as the chief scientific adviser to the Duke of Württemberg.

Career

In 1580, Maestlin became a professor of mathematics, first at the University of Heidelberg,

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