Περὶ οὐρανοῦ

aka De Caelo

On the Heavens

Author

Aristotle

Language

Classical Attic Greek

Year

c. 350-330 BCE

Country

Classical Athens

Genre

Nonfiction / Essays / Treatise

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On the Heavens is Aristotle's chief cosmological treatise: written in 350 BCE, it contains his astronomical theory and his ideas on the concrete workings of the terrestrial world. It should not be confused with the spurious work On the Universe.