Profiles the 28 known astronauts that have received NASA's rarest and most coveted decoration. Other titles by the author include Recipients of the Medal of Honor, Distinguished Service Cross, Navy Cross and Air Force Cross, Third Edition; Recipients of the Air Force Medal of Honor and Air Force Cross, Fifth Edition; The Decorations and Awards of Audie L. Murphy and Alvin C. York, The U.S. Military's Most Notable Infantryman, Second Edition; The Decorations, Awards and Honors of General of the Army Douglas MacArthur, The U.S. Military's Most Decorated Serviceman; The Orders, Decorations and Medals of Sir Winston Churchill and T. E. Lawrence; Recipients of the Congressional Gold Medal: Volume I, 1776-1900; and The Decorations and Awards of George A. Custer, George S. Patton Jr. and George Washington.