NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. Humans have known for millennia that some stars move with respect to their companions.

Science books possess a unique power to transform how we see the universe and our place within it. The greatest scientific writers don't just explain facts and theories; they reveal the extraordinary ...

I'm a planetary scientist who was born the year of Sputnik's launch. Over the course of my 40-year career, I've witnessed not one but at least five separate revolutions that fundamentally transformed ...