1. Dissatisfaction with the old Ptolemaic explanation.
2. A study of all known literature, to see if any better explanation
had been offered.
3. Careful thought on the subject, until his thinking took form in a
definite theory.
4. Long observation and testing out, to see if the observed facts
would support his theory.
5. The theory held to be correct, because it reduced all known facts
to a systematic order and harmony.
This is as clear a case of inductive reasoning as was L. Valla's exposure of the forgery of the so-called "Donation of Constantine," an example of deductive reasoning. Both used a new method—the method of modern scholarship. In both cases the results were revolutionary. As Petrarch stands forth in history as the first modern classical scholar, so Copernicus stands forth as the first modern scientific thinker. The beginnings of all modern scientific investigation date from 1543. Of his work a recent writer (E. C. J. Morton) has said:
Copernicus cannot be said to have flooded with light the dark places of nature—in the way that one stupendous mind subsequently did— but still, as we look back through the long vista of the history of science, the dim Titanic figure of the old monk seems to rear itself out of the dull flats around it, pierces with its head the mists that overshadow them, and catches the first gleam of the rising sun,…
Like some iron peak, by the Creator
Fired with the red glow of the rushing morn.
[Illustration: FIG. 114. TYCHO BRAHE (1546-1601)]
THE NEW METHOD OF INQUIRY APPLIED BY OTHERS. At first Copernicus' work attracted but little attention. An Italian Dominican by the name of Giordano Bruno (1548-1600), deeply impressed by the new theory, set forth in Latin and Italian the far-reaching and majestic implications of such a theory of creation, and was burned at the stake at Rome for his pains. A Dane, Tycho Brahe, after twenty-one years of careful observation of the heavens, during which time he collected "a magnificent series of observations, far transcending in accuracy [7] and extent anything that had been accomplished by his predecessors," showed Aristotle to be wrong in many particulars. His observations of the comet of 1577 led him to conclude that the theory of crystalline spheres was impossible, and that the common view of the time as to their nature [8] was absurd. In 1609 a German by the name of Johann Kepler (1571-1630), using the records of observations which Tycho Brahe had accumulated and applying them to the planet Mars, proved the truth of the Copernican theory and framed his famous three laws for planetary motion.