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Simplicius : On Aristotle On the Hea - Simplicius Of Cilicia


On Aristotle On the Hea

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Aristotle believed that the outermost stars are carried round us on a transparent sphere. There are directions in the universe and a preferred direction of rotation. The sun, moon and planets are carried on different revolving spheres. The spheres and celestial bodies are composed of an everlasting fifth element, which has none of the ordinary contrary properties like heat and cold which could destroy it, but only the facility for uniform rotation. But this creates problems as to how the heavenly bodies create light, and, in the case of the sun, heat.
The value of Simplicius' commentary on On the Heavens 2.1-9 lies partly in its preserving the lost comments of Alexander and partly in Simplicius' controversy with him. The two of them discuss not only the problem mentioned, but also whether soul and nature move the spheres as two distinct forces or as one. Alexander appears to have simplified Aristotle' system of 55 spheres down to seven, and some hints may be gleaned as to whether, simplifying further, he thinks there are seven ultimate movers, or only one.

Reaffirmation of the view that the heaven is eternal; rejection of alternative accounts of its endurance : the myth of atlas, the theory of a vortex motion, the world soulp. 10
Determination of up/down and right/left in the heaven; criticism of the pythagoreansp. 28
Why there is both a uniform east-west motion of the sphere of the fixed stars and west-east motions of the planetsp. 42
That the heaven is sphericalp. 55
Why the sphere of the fixed stars rotates from east to west rather than from west to eastp. 69
That the motion of the sphere of the fixed stars is uniformp. 73
That each star is composed of 'the body in which it has its motion'; explanation of the heat and light of the starsp. 90
That the stars do not move on their own but by being carried by something elsep. 100
That (contra the pythagoreans) no sound is produced by the motion of the starsp. 120
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9780715632000
ISBN-10: 0715632000
Series: Ancient Commentators on Aristotle
Audience: BAC
Format: Hardcover
Language: English
Number Of Pages: 256
Published: 21st October 2004
Country of Publication: GB
Dimensions (cm): 23.4 x 15.6  x 1.4
Weight (kg): 0.51
Edition Number: 1