An essential companion to the New York Times bestseller Welcome to the UniverseHere is the essential companion to Welcome to the Universe a New York Times bestseller that was inspired by the enormously popular introductory astronomy course for non science majors that Neil deGrasse Tyson Michael A. Strauss and J. Richard Gott taught together at Princeton. This problem book features more than one hundred problems and exercises used in the original course—ideal for anyone who wants to deepen their