The two theories about how Earth and the Sun move in space relative to each other are the geocentric theory and the heliocentric theory. The geocentric theory, proposed by ancient astronomers, suggests that Earth is at the center of the universe, with the Sun and other celestial bodies orbiting around it. In contrast, the heliocentric theory, introduced by Copernicus in the 16th century, states that the Sun is at the center of the solar system, and Earth and other planets revolve around it.
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