12.2
and it is shown to this day by the dwellers in the Chersonese, who hold it in reverence. Anaxagoras is said to have predicted that if the heavenly bodies should be loosened by some slip or shake, one of them might be torn away, and might plunge and fall down to earth; and he said that none of the stars was in its original position; for being of stone, and heavy, their shining light is caused by friction with the revolving aether, and they are forced along in fixed orbits by the whirling impulse which gave them their circular motion, and this was what prevented them from falling to our earth in the first place, when cold and heavy bodies were separated from universal matter.
12.3
But there is a more plausible opinion than this, and its advocates hold that shooting stars are not a flow or emanation of aetherial fire, which the lower air quenches at the very moment of its kindling, nor are they an ignition and blazing up of a quantity of lower air which has made its escape into the upper regions; but they are plunging and falling heavenly bodies, carried out of their course by some relaxation in the tension of their circular motion, and falling, not upon the inhabited region of the earth, but for the most part outside of it and into the great sea; and this is the reason why they are not noticed.
