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

Artemis rocket launch delayed for 2nd time in a week 01:36. NASA's star-crossed Space Launch System moon rocket was grounded for the second time in five days Saturday, this time by a large ...

Rockets that currently use liquid hydrogen include Atlas’s Centaur and Boeing’s Delta III and IV, while Blue Origin’s BE-3 and BE-7 engines also rely on hydrogen.

Some rocket launches have experimented with gases such as argon and nitrogen, which are also inert and can sometimes be cheaper. Helium, however, is much more prevalent in the industry.

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 long-awaited mission to send an unpiloted Orion crew capsule on a 37-day trip around the moon and back.. With a forecast ...

The showstopper was an 8-inch diameter line carrying liquid hydrogen into the rocket. It sprang a persistent leak at the inlet, known as a quick-disconnect, leading onboard the vehicle.

NASA’s deputy associate administrator for Exploration Systems Development Tom Whitmeyer explained that unlike liquid oxygen, which is “pumped” into the rocket, hydrogen requires pressure 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? A ...