What does it mean to say that the conceptual fact of perfect circular motion in the heavens is inconsistent with the empirical facts of how the heavenly bodies are observed to move in the sky?

Worldviews

What does it mean to say that the conceptual fact of perfect circular motion in the heavens is inconsistent with the empirical facts of how the heavenly bodies are observed to move in the sky?

Why is this important to the development of astronomy in the ancient and early modern periods?

The text is “Worldviews” by Richard Dewitt

What does it mean to say that the conceptual fact of perfect circular motion in the heavens is inconsistent with the empirical facts of how the heavenly bodies are observed to move in the sky?
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