The belief or theory that Earth is the center of the universe, or the philosophical attitude of viewing things from an Earth-centered perspective.
From geocentric + -ism (belief system). The term encapsulates not just a scientific model but an entire worldview prevalent until the Scientific Revolution.
Geocentricism wasn't just astronomy—it was bound up with theology, philosophy, and human pride, which is why overthrowing it took more than just better observations.
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