Chapter 29. On the universe and its name.
1. Mundus (the universe) is that which is made up of the heavens and earth and the sea and all the heavenly bodies. And it is called mundus for the reason that it is always in motion. For no repose is granted to its elements.
Chapter 30. On the form of the universe.
1. The form of the universe is described as follows: as the universe rises toward the region of the north, so it slopes away toward the south; its head and face, as it were, is the east, and its back part the north.
Chapter 31. On the heavens and their name.
1. The philosophers have asserted that the heavens are round, in rapid motion, and made of fire, and that they are called by this name (coelum) because they have the forms of the stars fixed on them, like a dish with figures in relief (coelatum).
2. For God decked them with bright lights, and filled them with the glowing circles of the sun and moon, and adorned them with the glittering images of flashing stars.
Chapter 32. On the situation of the celestial sphere.
1. The sphere of the heavens is rounded and its center is the earth, equally shut in on every side. This sphere, they say, has neither beginning nor end, for the reason that being rounded like a circle it is not easily perceived where it begins or where it ends.
2. The philosophers have brought in the theory of seven heavens of the universe, that is, globes with planets moving harmoniously, and they assert that by their circles all things are bound together, and they think that these, being connected, and, as it were, fitted to one another, move backward and are borne with definite motions in contrary directions.