216. THE SCIENTIFIC RENAISSANCE
HUMANISM AND SCIENCE
The Middle Ages were not by any means ignorant of science, [18] but its study naturally received a great impetus when the Renaissance brought before educated men all that the Greeks and Romans had done in mathematics, physics, astronomy, medicine, and other subjects. The invention of printing also fostered the scientific revival by making it easy to spread knowledge abroad in every land. The pioneers of Renaissance science were Italians, but students in France, England, Germany, and other countries soon took up the work of enlightenment.
COPERNICUS 1473-1543 A.D.
The names of some Renaissance scientists stand as landmarks in the history of thought. The first place must be given to Copernicus, the founder of modern astronomy. He was a Pole, but lived many years in Italy. Patient study and calculation led him to the conclusion that the earth turns upon its own axis, and, together with the planets, revolves around the sun. The book in which he announced this conclusion did not appear until the very end of his life. A copy of it reached him on his deathbed.
THE COPERNICAN THEORY
Medieval astronomers had generally accepted the Ptolemaic system. [19] Some students before Copernicus had indeed suggested that the earth and planets might rotate about a central sun, but he first gave reasons for such a belief. The new theory met much opposition, not only in the universities, which clung to the time-honored Ptolemaic system, but also among theologians, who thought that it contradicted many statements in the Bible. Moreover, people could not easily reconcile themselves to the idea that the earth, instead of being the center of the universe, is only one member of the solar system, that it is, in fact, only a mere speck of cosmic dust.
GALILEO, 1564-1642 A.D.
An Italian scientist, Galileo, made one of the first telescopes—it was about as powerful as an opera glass—and turned it on the heavenly bodies with wonderful results. He found the sun moving unmistakably on its axis, Venus showing phases according to her position in relation to the sun, Jupiter accompanied by revolving moons, or satellites, and the Milky Way composed of a multitude of separate stars. Galileo rightly believed that these discoveries confirmed the theory of Copernicus.