What characteristic of the Moon did Galileo discover that challenged the Aristotelian view of celestial bodies?

Answer

It possessed visible mountains, valleys, and craters

By observing topography on the Moon similar to Earth's surface, Galileo destroyed the dogma that celestial realms consisted only of perfect, unchanging spheres.

What characteristic of the Moon did Galileo discover that challenged the Aristotelian view of celestial bodies?

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Galileo's Revolutionary Observation - YouTube

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