Antique Celestial Sphere Print Astronomy Chart Northern Hemisphere Stars Constellations. $16.00, via Etsy.

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An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.

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An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations. Read more on wikipedia.

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What is on the paper map is a representation of what was in the retinal representation of the man who made the map; and as you push the question back, what you find is an infinite regress, an infinite series of maps

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Ashmolean Museum, University of Oxford, EA1978.2573. ‘The angel Ruh holding the celestial spheres’. A single page from a manuscript of Zakariya ibn Muhammad al-Qazwini ‘s The Wonders of Creation and the Oddities of Existence (Arabic: ‘Aja’ib al-makhluqat wa-ghara’ib al-mawjudat). Western Iran, second half of the 16th century.

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