Müller, Johann (1436–1476)
German astronomer and mathematician, also known as Regiomontanus. He studied
trigonometry and completed a translation of Ptolemy's Almagest
from the original Greek that had been started by his tutor, Georg von Peurbach
(1423–1461). Ironically, this translation, together with some comments
and observations added by Müller, helped overthrow the Ptolemaic
system of the universe. Müller also observed the motion of the
Moon, planets, and comets, and erected an observatory at Nürnberg,
which included several modified quadrants
and a few of the first weight-driven clocks.
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