Physics And Metaphysics Of Aristotle - Britannica

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Place

Every body appears to be in some place, and every body (at least in principle) can move from one place to another. The same place can be occupied at different times by different bodies, as a flask can contain first wine and then air. So a place cannot be identical to the body that occupies it. What, then, is place? According to Aristotle, the place of a thing is the first motionless boundary of whatever body is containing it. Thus, the place of a pint of wine is the inner surface of the flask containing it—provided the flask is stationary. But suppose the flask is in motion, perhaps on a punt floating down a river. Then the wine will be moving too, from place to place, and its place must be given by specifying its position relative to the motionless river banks.

Marble bust of Alexander the Great, in the British Museum, London, England. Hellenistic Greek, 2nd-1st century BC. Said to be from Alexandria, Egypt. Height: 37 cm. Britannica Quiz Ancient Greece

As is clear from this example, for Aristotle a thing is not only in the place defined by its immediate container but also in whatever contains that container. Thus, all human beings are not only on the Earth but also in the universe; the universe is the place that is common to everything. But the universe itself is not in a place at all, since it has no container outside it. Thus, it is clear that place as described by Aristotle is quite different from space as conceived by Isaac Newton (1643–1727)—as an infinite extension or cosmic grid (see cosmos). Newtonian space would exist whether or not the material universe had been created. For Aristotle, if there were no bodies, there would be no place. Aristotle does, however, allow for the existence of a vacuum, or “void,” but only if it is contained by actually existing bodies.

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