Researchers said Thursday they have identified the remains of Nicolaus Copernicus by comparing DNA from a skeleton and hair retrieved from one of the 16th-century astronomer's books.

The findings could put an end to centuries of speculation about the exact resting spot of Copernicus, a priest and astronomer whose theories identified the Sun, not the Earth, as the center of the universe.

Copernicus is believed to have come up with his main idea of the Sun at the center of the universe between 1508 and 1514, and during those years wrote a manuscript commonly known as Commentariolus (Little Commentary).

His final thesis was only published, however, in the year of his death. His ideas challenged the Bible, the church and past theories, and they had important consequences for future thinkers, including Galileo, Descartes and Newton.