The earth (he thinks, is flat in shape, and stays suspended where it is because of its size, because there is no void and because the air, which is very strong, keeps the earth afloat on it. Of the moisture on the earth, the sea came from the waters in the earth, the evaporation of which gave rise to all that has emerged, and from the rivers that flow into it. Rivers owe their origin partly to rain, partly to the waters in the earth; for the earth is hollow, and in its hollows contains water. The Nile rises in summer because waters are carried down into it from the snows in the south. The sun, the moon and all the stars are red-hot stones which the rotation of the aither carries round with it. Beneath the stars are certain bodies, invisible to us, that are carried round with the sun and the moon. We do not feel the heart of the stars because they are so far from the earth; moreover, they are not as hot as the sun because they occupy a colder region. The moon is beneath the sun an nearer to us. The sun exceeds the Peloponnese in size. The moon has not any light of its own but derives it from the sun. The stars in their revolution pass beneath the earth. Eclipses of the moon are due to its being screened by the earth, or sometimes, by the bodies beneath the moon; those of the sun to screening by the moon when it is new...He held that the moon was made of earth, and had plains and ravines on it.
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