Was Copernicus excommunicated

Answer 1

No, only other astronomers knew of his theories most of his life. Just before he died he arranged for the publication of his theories, De Revolutionibus. Some people say the published theory reached him on his death bed, although some accounts say he never saw the printed work. It is believed he died several hours after seeing the printed copy.

Galileo, on the other hand, had to rebuke his Copernican ideas under threat of excommunication.