Armillary Sphere with solar and lunar gearing (16th century)


Brass, with wooden stand, height c. 30 cm, diam. of the horizon 15.5 cm, weight c. 850 g
CHF 2400.00, EUR 2087.00

Armillary Sphere with solar and lunar gearing (16th century)

The armillary sphere was known from the middle ages until the renaissance as a demonstration instrument. The offered reconstruction follows in a free way to an instrument, probably made by Eberhard Baldewein (c. 1570), which also shows a solar and lunar gearing (L. von Mackensen, Die erste Sternwarte Europas… 400 Jahre Jost Bürgi in Kassel. München 1979, S. 92/93).

The reconstruction of an armillary sphere shows quick-motion: One turn of the sphere corresponds to seven days (not one day). So, 4 turns are required for a month, and 52 turns for a year.
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