Photo: Qudrans Muralis ur Johann Elert Bodes Uranographia 1801.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version
Photo: Kvadrant. Bildrättsinnehavare: Michael Daly.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version
Photo: Tycho Brahe: Astronomiae Instauratae Mechanica. Wandsbek 1598. Bilden tillhör Public domain enligt Wikimedia Commons.
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Sven OlssonPublic
Kvadrant. Bildrättsinnehavare: Michael Daly. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version