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The Sun-centred (heliocentric) model was put forward by Copernicus in 1543 in a theory that modelled the planets' movements just as accurately as the ancient Ptolemaic model, but it had the advantage that the planets moved in less-complicated paths.

Later (1609) Johannes Kepler produced the theory that we use today, which uses elliptical orbits for the planets. It was very different from Copernicus's theory but it retained the basic idea of having the Sun at the centre.

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10y ago

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