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Nicolaus Copernicus astronomy Claudius Ptolemy The center of the earth said Heliocentr said universe
02-20
world mankind Inner place Big Bang sun universe The Big Bang Heliocentr said leak
02-10
world World peace They Great writer list peace Qu yuan culture Heliocentr said ESB ServiceAnt
02-11
astronomy universe Extrasolar planets planet fixed star Jupiter Galaxy Heliocentr said Copernicus
01-02