Armillary

002040
  • Author:
  • Date: c. 1900
  • Medium:
  • Condition: Good
  • Inches: 5 1/2 x 9 1/2
  • Centimeters: 14.10 x 24.36
  • Price: Sold
Description:

The armillary sphere was a valuable teaching instrument, and was often used to demonstrate astronomical theories and served as a visual representation of the earth and its imaginary circles. The small sphere in the center representing earth, often perched upon a carved wood or brass stand, was surrounded by a skeletal globe representing the equator, tropics, arctic and Antarctic circles, and meridians passing through the poles at the first point of Libra and Aries. Special armillary spheres would have all of these features and an oblique ecliptic band divided into the twelve signs of the zodiac. While they were not considered a satisfactory calculating instrument, the usable aesthetics justified its continuation as a demonstration model for teaching astronomy.
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