The telescope has holes drilled around each end to fit the sprockets of a printer.  A knob on the
printer can be turned to rotate the telescope.  Markings on the telescope's rim can be aligned with
a reference point as the telescope rotates so that each increment of rotation is approximately the
same.  There are 88 such markings.  A webcam behind the telescope records images.  When the
telescope and webcam are in place, they are covered with black cloth to reduce the noise in the
images.  A projector, about twenty feet away from the telescope, serves as the point source of light.

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