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armillary sphere
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armillary sphere

Earliest known astronomical device, in use from the 3rd century BC. It showed the Earth at the centre of the universe, surrounded by a number of movable metal rings representing the Sun, Moon, and planets. The armillary sphere was originally used to observe the heavens and later for teaching navigators about the arrangements and movements of the heavenly bodies.



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Tosi selected the images of his study according to the objects that accompany the sitters: astrolabes, regular bodies, solar clocks, armillary spheres, globes, astronomical instruments, and mathematical texts.
Pre-industrial peoples generally considered their habitation as part of a total system that was essentially closed, much like images of the earth in an armillary sphere.
This coming June, in further celebration of the magic of light, diffraction gratings will be installed to radiate rainbows of color throughout the glass cube, while an updated armillary sphere of concentric circles will be unveiled at the Columbus Avenue entrance and depict New York City's location on January 1, 2000.
 
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