In this series, readers will travel back in time, experiencing the lives and cultures of some of the world's greatest scientists. Engrossing text and primary source images help students gain perspective on the scientific climate surrounding history's greatest scientific discoveries and theories. The text is accompanied by primary source images of the tools, manuscripts, illustrations, and artifacts of these scientists, who changed the way we see the world, both politically and religiously. This series is an eye-opening addition to any library. Using primary sources, this book illustrates the time line of Kepler's discovery of planetary motion. His finding helped usher in an age of scientific discovery that had never existed before, with science replacing religion as the basis for understanding the universe. Also included are Kepler's notes and manuscripts as well as reproductions of some of the tools he used.