Lecture XIII
Well, the matter is not quite so simple as that. For since Copernicus propounded his new theory of the universe, everything has become a matter of calculation, and the calculations at that time led to the following conclusion: The sun is taken to be the center of the universe; then come Mercury, Venus, Moon, Earth, and Mars, then the planetoids, then Jupiter, then Saturn. And now the comets and their orbits. And now think of it: the earth is circling and men can calculate when it will reach a certain point where the comet will be approaching it. Bang!—according to the calculations-they will collide. And at that time, gentlemen, they would actually have collided—only the comet was so small that it dissolved in the air! Not exactly in the air over Paris, but somewhere else. The calculation was therefore quite correct, but there was no ground for anxiety.