We all gaze at the night sky in wonder--and this guidebook, the ninth in the National Geographic Pocket Guide series, provides a go-to reference for everything filling the dark canvas above us. A basic guide to the solar system, distant galaxies, exoplanets and deep space, satellites and spacecraft, the big bang, meteor showers, and moon phases, this book also features scores of sky and constellation charts for stargazers. Each of the 140 featured topics includes a photograph or explanatory illustration or graphic. Interesting facts and tips throughout offer a quick guide to observing the night sky with the naked eye, from the Big Dipper and the North Star to auroras and eclipses.