Celestial spheres

Celestial spheres are an ancient astronomical concept where the sky is imagined as a series of concentric spheres surrounding the Earth. Each sphere holds different celestial bodies, like stars, planets, and the sun, which appear to move across the sky. This model helped early astronomers understand the movements of these bodies. While modern astronomy has revealed that the universe is far more complex, the idea of celestial spheres illustrates the historical perspective on how humans sought to explain what they observed in the heavens above them.