United Launch Alliance was testing last month a version of the Decatur-built Centaur upper stage designed to fly on its new Vulcan rocket, but a hydrogen leak caused a massive fireball, the fallout of ...

United Launch Alliance has started assembling its next Vulcan rocket—the first destined to launch a US military payload—as the Space Force prepares to certify it to loft the Pentagon’s most precious ...

WASHINGTON, Jan 8 (Reuters) - A robotic lander built by a private company suffered a propulsion system issue on its way to the moon on Monday, upending the first U.S. soft lunar landing attempt in ...

ULA's Vulcan is due to send up on Aug. 12 a pair of U.S. Space Force national security satellites on one of the company's most ambitious-ever launches. The Vulcan rocket, which has flown twice before, ...

Around this time last year, officials at United Launch Alliance projected 2025 would be their busiest year ever. Tory Bruno, ULA’s chief executive, told reporters the company would launch as many as ...