A SpaceX Falcon 9 rocket blasted off late Thursday, propelling a reusable X-37B Space Force rocket plane into space on a classified long-duration mission. It was the eighth such flight since the ...

The North American X-15 was built to flirt with the edge of space, not to cross it by accident. Yet on a research mission labeled Flight 90, a routine test profile slipped just far enough out of ...

North American Aviation’s X-15 rocket plane reached 4,520 mph and climbed to 354,200 feet during a program that ran from 1959 to 1968, producing flight data NASA credits as foundational to later U.S.

China's reusable Shenlong space plane launched on its fourth space mission earlier this month. What is it doing in Earth ...