The system of the great Copernicus, however, thanks to the anonymous preface to his famous work, “De Revolutionibus Orbium Cœlestium,” had not, up to this time, assumed to be a correct theory, but only a hypothesis, which need not be considered even probable, as it was only intended to facilitate astronomical calculations. We know now that this was a gigantic mistake, that the immortal astronomer had aimed at rectifying the Ptolemaic confusion, and was fully convinced of the correctness of his system; we know that this unprincipled Introduction is by no means to be attributed to Copernicus, but to Andreas Osiander, who took part in publishing this book, which formed so great an epoch in science, and whose anxious soul thereby desired to appease the anticipated wrath of the theologians and philosophers. And we know further that the founder of our present system of the universe, although he handled the first finished copy of his imperishable work when he was dying, was unable to look into it, being already struck by paralysis, and thus never knew of Osiander’s weak-minded Introduction, which had prudently not been submitted to him.[34] A few days after receiving a copy of the great work of his genius, Copernicus died, on 24th May, 1543; and his system, for which he had been labouring and striving all his life, was, in consequence of Osiander’s sacrilegious act, reduced to a simple hypothesis intended to simplify astronomical calculations! As such it did not in the least endanger the faith of the Church. Even Pope Paul III., to whom Copernicus had dedicated his work, received it “with pleasure.” In 1566 a second edition appeared at Basle, and still it did not excite any opposition from the Church. It was not till 1616, when it had met with wide acceptance among the learned, when its correctness had been confirmed by fresh facts, and it had begun to be looked upon as true, that the Roman curia felt moved to condemn the work of Copernicus until it had been corrected (_donec corrigantur_). Having thus rapidly glanced at the opposition between the Copernican system and the Ptolemaic, which forms the prelude to Galileo’s subsequent relations with Rome, we are at liberty to fulfil the task we have set ourselves, namely, to portray “Galileo and the Roman Curia.” CHAPTER II. _THE TELESCOPE AND ITS REVELATIONS._ Term of Professorship at Padua renewed.—Astronomy.—A New Star.—The Telescope.—Galileo not the Inventor.—Visit to Venice to exhibit it.—Telescopic Discoveries.—Jupiter’s Moons.—Request of Henry IV.—“Sidereus Nuncius.”—The Storm it raised.—Magini’s attack on Galileo.—The Ring of Saturn.—An Anagram.—Opposition of the Aristotelian School.—Letter to Kepler.