Add Yahoo as a preferred source to see more of our stories on Google. A pellet of plutonium 238, illuminated by the glow of its own radioactivity. NASA and other space agencies use this material in ...

Introduction: NASA's solar system exploration paradigm : the first fifty years and a look at the next fifty / James L. Green and Kristen J. Erickson -- Part I. Overview. Exploring the Solar System : ...

China envisions exploring the solar system, and it seems that would happen soon. The country launched Tianwen-2, an innovative space probe tasked with retrieving samples from an uncharted asteroid and ...

"Trip to the Planets, A" is a black-and-white science film featuring imaginative depictions of space travel in a giant airship. Heavy on intertitles, the film employs animation and detailed models to ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. We live in an extraordinary period of exploration. Over the last few decades, humanity ...