A note was written by Comenius in a copy of a manuscript by the astronomer Nicolas Copernicus. He bought it in 1614, just before leaving the University of Heidelberg. As he states here, he bought it with his last remaining funds from the widow of Dean Christmann.

The book, “On the Revolutions of Celestial Bodies,” was under a papal ban because it claimed the earth was not the center of the universe, as the Church taught. Throughout his life, Comenius followed and encouraged scientific research.