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'''Heliocentrism''' is the belief that the sun is the center of the universe; as opposed to the [[Ptolemaic system]], according to which [[Earth]] is at the center of the universe. It recognizes that the [[planet]]s are [[orbit]]ing [[Sol]], but later it was discovered that the sun is just a star in the [[Milky Way]], and that the latter is just one of the [[galaxy|galaxies]] in the universe.
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