On the Heavens【電子書籍】[ Aristotle ]

＜p＞"On the Heavens" is a treatise written by the ancient Greek philosopher Aristotle, in which he presents his views on the nature of the universe, the celestial bodies, and their motions.The work is divided into four books, each dealing with different aspects of the heavens. In Book I, Aristotle presents his basic principles for studying the heavens, including the idea that the celestial bodies are perfect and immutable, and that their motions are circular and uniform.In Book II, Aristotle discusses the differences between the terrestrial and celestial realms, and argues that the latter is made up of a different substance, which is eternal and unchanging.In Book III, Aristotle examines the various theories that had been proposed to explain the motions of the celestial bodies, including those of Eudoxus and Callippus. He ultimately rejects these theories, and presents his own explanation, which involves a complex system of concentric spheres, with the Earth at the center.In Book IV, Ar．．．楽天市場のショップで商品詳細の続きを見る