A Medieval Planetary Diagram in Graz University Library

First the circles were drawn. [...]the horizontal (east-west) line was drawn. [...]it seems obvious that the drawing was made in a single action, and that the rather disparate elements were drawn at one time and not added later on. [...]even the qualitative positions of the Sun and the outer planets...

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Bibliographic Details
Published in:Journal for the history of astronomy 2012-05, Vol.43 (2), p.141-149
Main Authors: Lippitsch, Max E., Draxler, Sonja
Format: Article
Language:English
Subjects:
Astronomy
History
History of science and technology
Jupiter
Libraries
Lunar eclipses
Mars
Middle Ages
Physical sciences and techniques
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Summary:First the circles were drawn. [...]the horizontal (east-west) line was drawn. [...]it seems obvious that the drawing was made in a single action, and that the rather disparate elements were drawn at one time and not added later on. [...]even the qualitative positions of the Sun and the outer planets are compatible with only a single year, namely 1154.
ISSN:0021-8286
1753-8556
DOI:10.1177/002182861204300201