NASA's star-crossed Space Launch System moon rocket was grounded for the second time in five days Saturday, this time by a large hydrogen leak in a fuel line quick-disconnect fitting that will ...

The bold question-askers at What If present a radical new plan for space travel using hydrogen balloons instead of rockets.

Russian space agency Roscosmos set the first launch of the Angara-A5M heavy-lift rocket for 2027 after considering the schedule for upgrading the Vostochny cosmodrome, Roscosmos CEO Dmitry Bakanov ...

A hydrogen leak prevented the launch of NASA’s SLS rocket this Saturday, in what is a troubling yet highly predictable development.

President Donald Trump wants to phase out NASA's Space Launch System — but the agency seems to have other plans. As Ars ...

Injecting aerosols into the atmosphere – but at higher altitudes than planes can reach – could cool the climate while ...

NASA scrubbed its second attempt to launch its Artemis 1 test flight on a mission to send an unpiloted capsule on a 37-day trip around the moon and back.

Europe's new Ariane 6 rocket ditched the helium of its predecessor Ariane 5 for a novel pressurization system that converts a small portion of its primary liquid oxygen and hydrogen propellants to ...

Born into this world as America's first liquid hydrogen rocket engine, it was continuously improved, and it will continue to be so for many years to come. The newest iteration of the powerplant?

Europe's new Ariane 6 rocket ditched the helium of its predecessor Ariane 5 for a novel pressurization system that converts a small portion of its primary liquid oxygen and hydrogen propellants to ...