![Collection of nine images including astronomical instruments, celestial charts, and a world map]. | Library of Congress](http://tile.loc.gov/image-services/iiif/service:gmd:gmd3:g3190:g3190:ct003797/full/pct:25/0/default.jpg "Collection of nine images including astronomical instruments, celestial charts, and a world map]. | Library of Congress")
Collection of nine images including astronomical instruments, celestial charts, and a world map]. | Library of Congress
Astronomical Observatories in the Classical Islamic Culture - Muslim HeritageMuslim Heritage
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Hellenistic Astronomy – The Science in Its Contexts | Brill
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Astrolabe - Wikipedia
Astrolabe - Wikipedia
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