With this newly revised Eleventh Edition of FOUNDATIONS OF ASTRONOMY, INTERNATIONAL EDITION, the authors' goals are to help you use astronomy to understand science -- and use science to understand what we are. Fascinating, engaging, and visually vibrant, this text will help you answer two fundamental questions: What are we? And how do we know? This edition addresses the newest developments and latest discoveries in the exciting study of astronomy, including information to emphasize observations over the entire electromagnetic spectrum; new data on star formation and stellar structure; new insight on global warming and ozone depletion; updated information on the Kuiper belt and dwarf planets; and much more.