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Fall behind means winter forward: the armillary sphere outside the College of Communication points to the bare trees and shorter daylight hours -- a sure sign that winter is on the way. Armillary spheres, skeletal celestial spheres originally with a model of the earth, and later the sun, placed in the center, were developed by the Greeks as teaching tools and observational instruments. The sphere is defined by three rings: the equator, the equinoctial colure (the band going around the sphere, at an angle to the equator), which represents the zodiac, and the solstitial colure (the line running through the middle of the band), which defines the path followed by the sun through the sky. Photo by Kalman Zabarsky
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November 2002
Boston University
Office of University Relations