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14051 | A cosmos is a collection of stars and an earth, with some sort of boundary, movement and shape [Epicurus] |
Full Idea: A cosmos is a circumscribed portion of the heavens containing stars and an earth; it is separated from the unlimited, with a boundary which is rare or dense; it is revolving or stationary; it is round or triangular, or some shape. All these are possible. | |
From: Epicurus (Letter to Pythocles [c.292 BCE], 88) | |
A reaction: Notice that there seem to exist the 'heavens' which extend beyond the cosmos. See Idea 14036, saying that there are many other cosmoi in the heavens. |