With this newly revised tenth edition of FOUNDATIONS OF ASTRONOMY, author Mike Seeds' goal is to help you use astronomy to understand science--and use science to understand what we are. Fascinating and engaging, this text will help you answer two fundamental questions: What are we? How do we know? This edition addresses the newest developments and latest discoveries in the exciting study of astronomy, including new data on Jupiter's ring system; new observations of the shapes of stars; new evidence of dark energy, quasars, and galaxy collisions; and a look inside supernova explosions. And for students looking for an interactive alternative to the print text, the FOUNDATIONS OF ASTRONOMY Online Version is the ideal solution. The Online Version gives you Web-based access to a digital version of Michael A. Seeds' best-selling astronomy textbook. If your instructor is using the Enhanced WebAssign� online homework management system, the Online Version includes access to your homework assignments as well, allowing you to quickly navigate between your homework and the text. Visit www.webassign.net/seeds to learn more.