Book 7
1.145
The moon, however, is of a more earthy composition, since it is nearer to the earth. These fiery bodies and the stars generally derive their nutriment, the sun from the wide ocean, being a fiery kindling, though intelligent; the moon from fresh waters, with an admixture of air, close to the earth as it is: thus Posidonius in the sixth book of his Physics; the other heavenly bodies being nourished from the earth. They hold that the stars are spherical in shape and that the earth too is so and is at rest; and that the moon does not shine by her own light, but by the borrowed light of the sun when he shines upon her.
1.145
An eclipse of the sun takes place when the moon passes in front of it on the side towards us, as shown by Zeno with a diagram in his treatise On the Whole.
