The diameter of the earth is greater than the diameter of the moon and the diameter of the sun is greater than the diameter of the earth.
Finally we shall place the Sun himself at the center of the Universe.
The Earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the Moon with the arc of a perfect circle.
Near the Sun is the center of the universe. Moreover, since the Sun remains stationary, whatever appears as a motion of the Sun is really due rather to the motion of the Earth.
