What cosmological shift resulted from proving the Moon had Earth-like features?
Answer
It contradicted Aristotelian cosmology
The observation that the Moon possessed mountains and valleys—features implying geological processes similar to those on Earth—had profound cosmological implications because it directly refuted the core tenet of Aristotelian philosophy. This philosophy asserted that celestial bodies were fundamentally different from terrestrial matter and possessed inherent perfection and immutability. By demonstrating that the Moon shared physical imperfections with Earth, Galileo shattered the rigid dualism between the corruptible Earth and the perfect heavens, opening the pathway for a unified, physical understanding of the solar system where other planets could also possess Earth-like characteristics.

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