<p>We all know that Nicolaus Copernicus corrected an old error, the<br>belief that the sun revolves aroud the earth. It is much less known that Copernicus' development of his heliocentric was based on another error.<br><br><br>This short e-book describes productive errors of Copernicus and his successor Kepler.<br><br>Derek Miller is an experienced science journalist. He wrote several articles on productive errors in science and history.</p>...