What are some of Nicolaus Copernicus' accomplishments?

Answer 1

Nicolaus Copernicus was a real astronomer who was able to figure out that the earth, as well as all the planets, revolved around the sun and that the Earth rotates on its axis once every day*.

Nicolaus Copernicus was an astronomer who discovered that the Sun is the center of the universe (Heliocentric Theory) and the planets and stars revolved around it. This discovery shattered the Geocentric Theory, the thought that the Earth was the center of the universe and everything revolved around it.

Bcause he knew his findings would be rejected, and he might face exicution, he did not publish his book On the Revolutions of Heavenly Bodies until 1543, the year he died.

*Johannes Kepler discovered this