Sandro del Prete

Here the planetary system is symbolized with the help of two intertwined coach wheels. The common hub and spokes represent the sun, its beams, and gravitational force. The sun holds the planets "prisonier" in their respective orbits. Since the lines are deliberately drawn in erroneous perspective, the wheels appear to tilt over. One and the same side of wheel can be seen - from above in the lower part of the illustration and from beneath in the upper part; with the other wheel, it is the exact opposite.