By Simplicius, Ian Mueller
Aristotle believed that the outermost stars are carried around us on a clear sphere. There are instructions within the universe and a well-liked course of rotation. The solar, moon and planets are carried on diverse revolving spheres. The spheres and celestial our bodies are composed of an enduring 5th point, which has not one of the traditional opposite houses like warmth and chilly which can ruin it, yet in basic terms the power for uniform rotation. yet this creates difficulties as to how the heavenly our bodies create mild, and, in terms of the sunlight, warmth. the subjects coated during this a part of Simplicius' observation are: the speeds and distances of the celebs; that the celebs are round; why the sunlight and moon have fewer motions than the opposite 5 planets; why the sector of the fastened stars comprises such a lot of stars while the opposite heavenly spheres comprise not more than one (Simplicius has a protracted excursus on planetary thought in his observation in this chapter); dialogue of people's perspectives at the place, movement or leisure, form, and dimension of the earth; that the earth is a comparatively small sphere at leisure within the centre of the cosmos
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The early Egyptians and Babylonians say the same thing about other stars, and they have made observations for very many years, and we have much trustworthy evidence about each of the stars from them. (292a10) So one might rightly raise this difficulty and also the following: what is the reason why the multitude of stars in the first motion is so great that their whole grouping is thought to be uncountable, whereas for each of the others, there is one separate
He says, ‘that is why the earth does not move at all’, its lack of motion not being for the same reason for which the good and that for the sake of which is motionless; the latter is that for the sake of which things which move move, and it is not necessary for it88 to move. However, since the earth is last, it is not of such a nature as to share in that for the sake of which immediately, but to do so by being as near to things which share in it directly as is possible for it, and
And if so great a number of bodies exceeds the kinetic power of the one sphere with respect to being moved by it, then, if the sphere having one star had many, the assigned task would be really difficult. It seems to me that this argument goes forward
Simplicius : on Aristotle on the heavens 2.10-14 by Simplicius, Ian Mueller