World Views and the Solar System
Galileo Galilei rubbed his eyes. Peering through his spyglass was difficult work. The images were not crystal clear, and the night was cold. But he had seen wonders in God’s firmament over the past several evenings: the lunar surface had mountains and valleys, more like the Earth than Aristotle’s perfect featureless orb, and faint cloudy areas in the sky had resolved into a multitude of stars never before seen with the naked eye. And now, on January 11, 1610, he would once again be checking on the star-like objects lined up to the east and west of Jupiter.