Antique Armillary Spheres
The armillary sphere is the oldest known instrument for the astronomy of antiquity.
Planetaria and antique armillary spheres from XVIII – XIX, Ptolemaic sphere and Copernicus models.
It became more complicated with the increase of knowledge : supplementary concentric and movable rings were added to show the supposed orbits of the moon, the sun, the planets, with their eccentricities and the longterm motions by which they are modified.
These instruments became more and more complicated and so gradually lost all suitability for practical measurements. They became curiosities for collectors, masterpieces of craftsmanship, which were elaborately and richly ornamenented for their princely owners.
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Custom work for private clients and institutions.