The United States military’s most enigmatic spacecraft is back in orbit, and this time officials are hinting more clearly at ...

The Dream Chaser space plane was integrated with the 'Shooting Star' module at NASA's Armstrong Test Facility in Ohio. Sierra ...

The U.S. military's elusive X-37B space plane has postponed its next launch by three days. Based on the rocket its riding on, the secretive spacecraft is likely launching farther than ever before.

LOUISVILLE, Colo.--(BUSINESS WIRE)--Sierra Space, a proven Defense Tech company delivering solutions for the nation’s most critical missions and advancing the future of security in space, announced ...

In order to get a spaceship in top-notch condition for its first trip to space, a lot of things must be done just right. Including a huge number of tests that tell engineers if everything is primed to ...

I sometimes wonder where we would be now, as a species, had the Soviet Union not collapsed and continued its space race with the United States. Would we have already colonized other planets by now, or ...

The Artemis 2 moon mission will send a swatch from the famous Wright Flyer, along with a number of other aerospace artifacts, ...

Freightliner Trucks, a subsidiary of Daimler Truck North America, worked with Sierra Space on high-speed runway tow tests for the Dream Chaser autonomous spaceplane, designed to transport pressurized ...