The Inca of Peru believed that the Sun had the power to make things grow. They were right, and they were not alone in this knowledge. The connection between sky and Earth exists for all people. In the Americas, astronomical observations ranged from precisely timed and measured eclipses, through monitoring the Sun's motion along the horizon, to beginning a season by watching for the first day that a particular star rises in the morning sky. Before the arrival of the horse, and without telescopes, or computers, Americans organized and predicted the motions of the Sun, Moon and planets. Explanations of these observations range from mathematically precise models capable of predicting the dates of eclipses or planetary appearances, to ambiguous mythological accounts. In the slide show, we will show you some of the uses of astronomy by the Inca of South America, the Maya of Mesoamerica, and a glimpse of Puebloan activities in North America.