Nicholas Copernicus was afraid that no one would accept his theory so he did not release his book until the year of his death. Many say that he died with his book in his hands on his death bed.
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Nicolaus Copernicus
Nicolaus Copernicus was , by trade, a mathematician and astronomer. With this background, he was well suited to establish his theory of heliocentrism.
anex: developing a heliocentric theory
Nicolaus Copernicus
because the people would never know and this history about planet would never exist