File:Tycho-Brahe-Mural-Quadrant.jpg

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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.
Date circa 1598
date QS:P,+1598-00-00T00:00:00Z/9,P1480,Q5727902
Source 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 authorUnknown author
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This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain".
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Other versions
File:Mauerquadrant.jpg
3,134 × 4,600 pixels
File:Tycho Brahe's mural quadrant in Uranienborg.png
579 × 787 pixels
File:Fotothek df tg 0005682 Astronomie ^ Vermessung ^ Messinstrument.jpg
558 × 820 pixels

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Date/TimeThumbnailDimensionsUserComment
current04:52, 8 August 2018Thumbnail for version as of 04:52, 8 August 20181,499 × 2,024 (1.11 MB)Soerfm (talk | contribs)Brightness, color
23:40, 9 May 2012Thumbnail for version as of 23:40, 9 May 20121,499 × 2,024 (1,007 KB)AxelBoldt (talk | contribs){{Information |Description=Tycho Brahe's mural quadrant in Uranienborg (Uraniborg). The quadrant (radius c. 194cm) made from brass was affixed to a wall that was oriented precisely nor...

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