| http://www.w3.org/ns/prov#value | - For thirty years before his death Copernicus had been convinced that the accepted view of the position of the earth among the heavenly bodies was erroneous, but his conviction that the sun is the center of the system, that the earth is a planet like Mars and Venus, and that all the planets revolve around the sun was known to only a few people, most of them his friends.
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