And Physics show these three movements only, as is proved in the fifth chapter of its first book. And on account of the Galaxy this heaven has great resemblance to Metaphysics. For it must be known that of this Galaxy the philosophers have held diverse opinions. For the Pythagoreans said that the Sun once wandered out of his path; and, passing through other parts not adapted to his heat, he burned the place through which he passed, and the appearance of the burning remained there. I think they were influenced by the fable of Phaeton which Ovid narrates at the beginning of the second book of his Metamorphoses. Others, as Anaxagoras and Democritus, said that it was the light of the Sun reflected in that part. And these opinions they proved by demonstrative reasons. What Aristotle said upon this subject cannot be exactly known, because his opinion is not the same in one translation as in the other. And I think this was an error of the translators; for in the new he seems to say that it is a collection of vapors beneath the stars in that part, which always attract them; and this does not seem to be very reasonable.