Mirror

The "Mirror" was a work by the Greek mathematician and astronomer Eudoxus of Cnidus, who lived around 395–337 BCE. This work, though no longer extant, is known to have described constellations, the visibility of stars, and associated weather patterns. Eudoxus also discussed the relative sizes of the Sun, Moon, and Earth and may have developed an eight-year calendar cycle.1

Eudoxus is most famous for creating the first sophisticated geometrical model of celestial motion. His model, described in a work called "On Speeds," used a system of interconnected, concentric spheres to represent the movements of the Sun, Moon, and planets. This model, later modified by Aristotle, significantly influenced astronomical thought for centuries.12