Rome is the only place in the whole world where there is a temple dedicated to a comet—the one which was thought by the late Emperor Augustus to be auspicious to him, from its appearing during the games which he was celebrating in honor of Venus, not long after the death of his father Cæsar. He expressed his joy in these terms: “During the very time of these games of mine, a hairy star was seen during seven days, in the part of the heavens which is under the Great Bear. It rose about the eleventh hour of the day, was very bright, and was conspicuous in all parts of the earth. The common people supposed the star to indicate, that the soul of Cæsar was admitted among the immortal Gods.” This is what he proclaimed in public, but, in secret, he rejoiced at this auspicious omen, interpreting it as produced for himself; and, to confess the truth, it really proved a salutary omen for the world at large. Some persons suppose that these stars are permanent and that they move through their proper orbits, but that they are only visible when they recede from the sun. Others suppose that they are produced by an accidental vapor together with the force of fire, and that, from this circumstance, they are liable to be dissipated. CHAPTER V. THE DOCTRINE OF HIPPARCHUS ABOUT THE STARS. Hipparchus, who can never be sufficiently commended, as one who more especially proved the relation of the stars to man, and that our souls are a portion of heaven, discovered a new star that was produced in his own age, and, by observing its motions on the day in which it shone, he was led to doubt whether this does not often happen, that those stars have motion which we suppose to be fixed. And the same individual attempted, what might seem presumptuous even in a deity, to number the stars for posterity and to express their relations by appropriate names; having previously devised instruments,[17] by which he might mark the place and the magnitude of each individual star. In this way it might be easily discovered, not only whether they were destroyed or produced, but whether they changed their relative positions, and likewise, whether they were increased or diminished; the heavens being thus left as an inheritance to any one, who might be found competent to complete his plan. CHAPTER VI. OF THE STARS WHICH ARE NAMED CASTOR AND POLLUX.