Image: Tycho-Brahe-Mural-Quadrant

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Description: Tycho Brahe's mural quadrant in Uranienborg (Uraniborg). The quadrant (radius c. 194cm) was made from brass and was affixed to a wall that was oriented precisely north-south. The observer (right) views a star through the opposite opening (upper left) to determine the star's altitude as it passes through the meridian. An assistant (lower right) reads the time off a clock and another one (lower left) records the measurements. The area above the quadrant is filled with a mural painting showing several other of Brahe's instruments. See Brahe's original description of the instrument.
Title: Tycho-Brahe-Mural-Quadrant
Credit: Engraving from the book: Tycho Brahe (1598), Astronomiae instauratae mechanica, Wandsbeck. Downloaded from the online exhibition at the Royal Library; stitching by Axel Boldt
Author: Unknown
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Tycho Brahe

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