Ancient astronomers thought the heavens were perfect circles, spheres, and unblemished.

Question

Quizplus · Accepted Answer

This is true. Ancient astronomers believed that the heavens were perfect and unchanging, and that the stars and planets moved in perfect circles and spheres. This idea persisted for centuries until the work of scientists like Galileo and Johannes Kepler, who showed that the heavens were more complicated and dynamic than previously thought.

Ancient Astronomers Thought the Heavens Were Perfect Circles, Spheres, and Unblemished