United Launch Alliance was supposed to fly its first national security mission on its new Vulcan rocket three years ago. On what would be Vulcan’s third ever launch and first for the government flying ...

For comparison's sake, the International Space Station orbits about 250 miles above the Earth's surface.Start the day smarter. Get all the news you need in your inbox each morning. ...

Despite SpaceX decamping its longtime Southern California headquarters for Texas last year, the region remains an integral ...