Giordano Bruno
Bruno did accept and promote Copernicus' idea that the Earth revolves round the Sun. Many believe this was one of main reasons for his downfall; others think his theological beliefs were more critical. In 1584 he published two dialogues which argued for his idea on astronomy. Eight years later he was arrested, and his trial took another eight years. His accusers demanded complete recantation of all his 'erroneous' beliefs. He refused, and went to his death. Later the Inquisition used his example to terrify Galileo into withdrawing his works from publication.