Nicolaus Copernicus - Pioneer Astronomer is the biography of Nicolaus Copernicus, the first astronomer to formulate a scientifically based heliocentric cosmology that displaced the Earth from the center of the universe. His epochal book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), is often regarded as the starting point of modern astronomy and the defining epiphany that began the Scientific Revolution. Copernicus was a mathematician, astronomer, physician, classical scholar, translator, Catholic cleric, jurist, governor, military leader, diplomat and economist. Amid his extensive responsibilities, astronomy figured as little more than an avocation - yet it was in that field that he made his mark upon the world. Nicolaus Copernicus - Pioneer Astronomer is highly recommended for those interested in reading more about this important Renaissance Astronomer.