X-37B spaceplane is secretive and operates in orbit for research and testing, competing with China. Spaceplanes operate in space and air, land accurately on runways, but need a rocket launch.

-America’s X-37B space plane looks like a scaled-down shuttle, but it has become one of the most consequential military programs of the post-Cold War era. -Born as a NASA technology demonstrator and ...

When the X-37B launches on its eighth mission no earlier than Aug. 21, it will carry an experimental quantum inertial sensor. When you purchase through links on our site, we may earn an affiliate ...