What is the United States Air Force X-37B? It is a secret unmanned (robotic) space plane that has been on four missions with one over a year in orbit.

The space plane looks like a miniaturized adaptation of NASA’s space shuttle. It is 29 feet long and a little under 10 feet tall with a wingspan of almost 15 feet. The manned space shuttles were 122 feet long with a wingspan of 78 feet. Continue reading What is the United States Air Force X-37B? →