How Do We Know the Earth Orbits the Sun?

There was a recent news item about Star Trek’s Kate Mulgrew in a geocentric movie. The geocentric model states that the Sun and the planets move around the Earth instead of the heliocentric model with the Sun in the center. That’s just silly, right? Obviously the Earth orbits the Sun. Sure, the textbooks all say […]

How Do We Know the Earth Orbits the Sun?

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