"On the Heavens" is a work by the ancient Greek philosopher Aristotle, in which he explores the nature and properties of the celestial bodies, including the stars and planets. The book is divided into four sections, each of which provides a detailed analysis of different aspects of the heavens. Throughout "On the Heavens," Aristotle employs a systematic and logical approach to his subject matter, drawing on empirical observations and careful reasoning to arrive at his conclusions. The result is a work that provides a comprehensive and detailed account of the nature and properties of the heavens, as well as a foundation for later astronomical inquiry.