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Changes Ahead
U.S. military forces stationed abroad play vital roles. This study offers eight options that can be used to help guide thinking and planning for the coming era of change.
Congressional Record
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Astronomy
Since ancient times people around the world have used astronomy to time the seasons, to navigate at sea, and to understand our world. Selections in this volume span the history of astronomy from the earliest star charts to contemporary plans for planetary expeditions.
The 4-Percent Universe
Meet the players in the most fundamental scientific revolution since Copernicus The Facts of Matter It is one of the most disturbing aspects of our universe: only four per cent of it consists of the matter that makes up every star, planet, and every book. The rest is completely unknown. Acclaimed science writer Richard Panek tells the story of the handful of scientists who have spent the past few decades on a quest to unlock the secrets of “dark matter” and the even stranger substance called “dark energy”. These are perhaps the greatest mysteries in science,and solving them will reshape our understanding of the universe and our place in it. The stakes could not be higher. Panek’s fast-paced narrative, filled with original, in-depth reporting and intimate, behind-the-scenes details, brings this epic story to life for the very first time.
Physics Letters
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