De revolutionibus orbium coelestium has 405 pages.
A:Copernicus' book, De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres), was placed on the Index of Forbidden Books by a decree of the Sacred Congregation of March 5, 1616:This Holy Congregation has also learned about the spreading and acceptance by many of the false Pythagorean doctrine, altogether contrary to the Holy Scripture, that the earth moves and the sun is motionless, which is also taught by Nicholaus Copernicus' De revolutionibus orbium coelestium and by Diego de Zúñiga's In Job ... Therefore, in order that this opinion may not creep any further to the prejudice of Catholic truth, the Congregation has decided that the books by Nicolaus Copernicus [De revolutionibus] and Diego de Zúñiga [In Job] be suspended until corrected.
Nicolaus Copernicus proposed the idea that the Earth revolved around the Sun in his book "De revolutionibus orbium coelestium" published in 1543. This heliocentric model of the solar system challenged the prevailing geocentric view of the time.
Copernicus wrote one major book called "De revolutionibus orbium coelestium" (On the Revolutions of the Celestial Spheres), which was published in 1543. This work outlined his heliocentric theory that the Earth and other planets revolve around the Sun.
There is no exact date that can be known, some like to mark its beginning with the birth, in 1473, of Nicolaus Copernicus, or with the publication of his work, in 1543, De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres), declaring a solar system with the Sun at its center. Most will agree that it was a force in science by the end of the 18th century and many would argue that it is still going on. This revolution was driven, not by one, but by many, new ideas. This is why it is impossible to date. However, somewhere between Copernicus' birth and his revolutionary paper, it must had to have started.
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