Nicolaus Copernicus was born in 1473 and died in 1543. He was 70 years old. He was born in Torun, Poland. His parents were German.
He became a astronomer and proved that the planets orbited around the sun. People thought the planets orbited around Earth. He did not speak out about this too much because he was Christian and the Christian Church at the time would kill or punish people who spoke against the Church and God.
His word is still known and important to people because we continue to study outerspace and want to learn more about the universe. He also gave us a huge head start or source of information to begin with.