WASHINGTON — The race to replace the Russian RD-180 rocket engine is steadily moving forward as companies plug away on developing and testing new engines and launch systems. Help in the form of ...

WASHINGTON — The Pentagon’s congressional overseers appear divided over the timetable for weaning the U.S. Air Force from a controversial Russian rocket engine, a matter that sources say likely will ...

WASHINGTON — United Launch Alliance has signed contracts to study potential replacements for the Russian-made RD-180 engine that powers the first stage of its Atlas 5 rocket, and hopes to select a ...

COLORADO SPRINGS, Colo. — With the replacement of the RD-180 all but inevitable, the head of a Russian space agency downplayed concerns about losing the engine's biggest buyer: the Lockheed Martin and ...

ORLANDO If U.S. lawmakers have their way, the Russian-built RD-180 engine will cease being used on military launches by 2019. Language agreed upon for the FY2015 National Defense Authorization Act, ...

Space launch vehicles usually require multiple stages to accelerate the spacecraft to speeds necessary to place payloads in their intended orbits. The first or boost stage, at the base of the rocket, ...

Centennial-based rocketeer didn't bid against SpaceX for one military launch, but it doesn't want to stay sidelined. Colorado's United Launch Alliance doesn’t expect to be sidelined for long on ...

Boeing’s president of network and space systems says he’s yet to see the business case for developing an alternative rocket engine to the Russian-built RD-180 that powers the Atlas V rocket, even as ...

The Russian RD-180 rocket engine has been an integral part of the U.S. military’s space launch capabilities since the 1990s. The RD-180 was chosen for the Atlas V because it was an advanced rocket ...