Discover the story of the North American X-15's first powered flight on September 17, 1959, when Scott Crossfield piloted the ...

The X-15 wasn’t just a plane—it was a groundbreaking experiment that pushed humanity closer to space. With speeds of Mach 6.7 ...

On Aug. 22, 1963, U.S. Air Force Captain Joe Walker flew an X-15 space plane higher than any pilot had ever flown before. Walker reached an altitude of over 67 miles (108 kilometers). That's about 5 ...

In the dark of night, SpaceX will launch the mysterious X-37B space plane for the U.S. Space Force (USSF). A Falcon 9 rocket ...

OTV-8 is the third X-37B mission to launch on a SpaceX rocket. (Two have employed Falcon 9s and one lifted off on a Falcon Heavy ). The other five flew atop United Launch Alliance's workhorse Atlas V, ...