There was more than one astronomer who agreed with the heliocentric theory and was imprisoned for his investigations. The astronomers were Copernicus, John Dalton, Lamarck, and Galileo.
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I am actually doing a report on Copernicus. He took back what he said but right as he was dying they found out that he was right and his last words were. " I knew the sun was the center, all along."
Galileo Galilee
HE was the first astronomer to figure out the earth wasn't the center of the universe the sin was it was the heliocentric theory
copernicus coined the heliocentric theory...
In the Dark Age of Science, it was believed that Earth was in the center of Solar System and all the planets including sun, revolve round the sun. This is called Geocentric Theory.Nicolas Copernicus, A Polish*Astronomer, proved that earth and other planets revolved round the sun. This is Heliocentric Theory.(Copernicus proposed the Heliocentric Theory in 1543, 64 years before the invention of telescope. I was all the work of his Mathematics.)_________________________________________________________________* Polish Astronomer is an Astronomer from Poland