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What Parts of the World are on the Right Hand, and what on the Left.
Pythagoras, Plato, and Aristotle declare that the eastern parts of the world, from whence motion commences, are of the right, those of the western are of the left hand of the world. Empedocles, that those that are of the right hand face the summer solstice, those of the left the winter solstice.
Of Heaven, what is its Nature and Essence.
Anaximenes affirms that the circumference of heaven makes the limit of the earth’s revolution. Empedocles, that the heaven is a solid substance, and hath the form and hardness of crystal, it being composed of the air compacted by fire, and that in both hemispheres it invests the elements of air and fire. Aristotle, that it is formed by the fifth body, and by the mixture of extreme heat and cold.
Into How Many Circles is the Heaven Distinguished; Or, of the Division of Heaven.
Thales, Pythagoras, and the followers of Pythagoras do distribute the universal globe of heaven into five circles, which they denominate zones; one of which is called the arctic circle, which is always conspicuous to us, another is the summer tropic, another is the solstice, another is the winter tropic, another is the antarctic circle, which is always out of sight. The circle called the zodiac is placed under the three that are in the midst, and is oblique, gently touching them all. Likewise, they are all divided in right angles by the meridian, which goes from pole to pole. It is supposed that Pythagoras made the first discovery of the obliquity of the zodiac, but one Oenopides of Chios challenges to himself the invention of it.
What is the Essence of the Stars, and How They are Composed.
Thales affirms that they are globes of earth set on fire. Empedocles, that they are fiery bodies arising from that fire which the aether embraced within itself, and did shatter in pieces when the elements were first separated one from another. Anaxagoras, that the circumambient aether is of a fiery substance, which, by a vehement force in its whirling about, did tear stones from the earth, and by its own power set them on fire, and establish them as stars in the heavens. Diogenes thinks they resemble pumice stones, and that they are the breathings of the world; again he supposeth that there are some invisible stones, which fall sometimes from heaven upon the earth, and are there quenched; as it happened at Aegos-potami, where a stony star resembling fire did fall. Empedocles, that the fixed stars fastened to the crystal, but the planets are loosened. Plato, that the stars for the most part are of a fiery nature, but they are made partakers of another element, with they are mixed after the resemblance of glue. Zenophanes, that they are composed of inflamed clouds, which in the daytime are quenched, and in the night are kindled again. The like we see in coals; for the rising and setting of the stars is nothing else but the quenching and kindling of them. Heraclitus and the Pythagoreans, that every star is a world in an infinite aether, and encompasseth air, earth, and aether; this opinion is current among the disciples of Orpheus, for they suppose that each of the stars does make a world. Epicurus condemns none of these opinions, for he embraces anything that is possible.
Of what Figure the Stars are.
The Stoics say that the stars are of a circular form, like as the sun, the moon, and the world. Cleanthes, that they are of a conical figure. Anaximenes, that they are fastened as nails in the crystalline firmament; some others, that they are fiery plates of gold, resembling pictures.
Of the Order and Place of the Stars.
Xenocrates says that the stars are moved in one and the same superficies. The other Stoics say that they are moved in various superficies, some being superior, others inferior. Democritus, that the fixed stars are in the highest place; after those the planets; after these the sun, Venus, and the moon, in order. Plato, that the first after the fixed stars that makes its appearance is Phaenon, the star of Saturn; the second Phaeton, the star of Jupiter; the third the fiery, which is the star of Mars; the fourth the morning star, which is the star of Venus; the fifth the shining star, and that is the star of Mercury; in the sixth place is the sun, in the seventh the moon. Plato and some of the mathematicians conspire in the same opinion; others place the sun as the centre of the planets. Anaximander, Metrodorus of Chios, and Crates assign to the sun the superior place, after him the moon, after them the fixed stars and planets.
Of the Motion and Circulation of the Stars.
Anaxagoras, Democritus, and Cleanthes say that all the stars have their motion from east to west. Alcmaeon and the mathematicians, that the planets have a contrary motion to the fixed stars, and in opposition to them are carried from the west to the east. Anaximander, that they are carried by those circles and spheres on which they are placed. Anaximenes, that they are turned under and about the earth. Plato and the mathematicians, that the sun, Venus, and Mercury hold equal measures in their motions.
Whence do the Stars Receive Their Light?
Metrodorus says that all the fixed stars derive their light from the sun. Heraclitus and the Stoics, that earthly exhalations are those by which the stars are nourished. Aristotle, that the heavenly bodies require no nutriment, for they being eternal cannot be obnoxious to corruption. Plato and the Stoics, that the whole world and the stars are fed by the same things.
What are Those Stars which are Called the Dioscuri, the Twins, or Castor and Pollux?
Xenophanes says that those which appear as stars in the tops of ships are little clouds brilliant by their peculiar motion. Metrodorus, that the eyes of frighted and astonished people emit those lights which are called the Twins.
How Stars Prognosticate, and what is the Cause of Winter and Summer.
Plato says that the summer and winter indications proceed from the rising and setting of the stars, that is, from the rising and setting of the sun, the moon, and the fixed stars. Anaximenes, that the rest in this are not at all concerned, but that it is wholly performed by the sun. Eudoxus and Aratus assign it in common to all the stars, for thus Aratus says:—
Thund’ring Jove stars in heaven hath fixed,
And them in such beauteous order mixed,
Which yearly future things predict.