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.