This movie illustrates the homocentric model of Euxodos. We have used "hoops"
in this model because it is easier to see their rotation. You might need to convince
yourself that a rotating hoop generates a sphere. To see this, set a coin rotating
on the tabletop.
This model consists of only two spheres, but it illustrates the way in which
the model can create complex motions. In the model, the earth is at the center of
the homocentric spheres.
Click the symbol in the lower left corner to start and stop the movie. The symbols
in the lower right corner will advance the movie forwards or backwards one step at
a time.