The orrery or picture of the heavens given in the Republic differs in its mode of representation from the circles of the same and of the other in the Timaeus. In both the fixed stars are distinguished from the planets, and they move in orbits without them, although in an opposite direction: in the Republic as in the Timaeus they are all moving round the axis of the world. But we are not certain that in the former they are moving round the earth. No distinct mention is made in the Republic of the circles of the same and other; although both in the Timaeus and in the Republic the motion of the fixed stars is supposed to coincide with the motion of the whole. The relative thickness of the rims is perhaps designed to express the relative distances of the planets. Plato probably intended to represent the earth, from which Er and his companions are viewing the heavens, as stationary in place; but whether or not herself revolving, unless this is implied in the revolution of the axis, is uncertain (Timaeus). The spectator may be supposed to look at the heavenly bodies, either from above or below. The earth is a sort of earth and heaven in one, like the heaven of the Phaedrus, on the back of which the spectator goes out to take a peep at the stars and is borne round in the revolution. There is no distinction between the equator and the ecliptic. But Plato is no doubt led to imagine that the planets have an opposite motion to that of the fixed stars, in order to account for their appearances in the heavens. In the description of the meadow, and the retribution of the good and evil after death, there are traces of Homer.