Eco-friendly alternatives to fossil fuels are venturing beyond Earth—and into space.

Russia's state-owned Rosatom announced a prototype plasma engine which could speed up travel to other planets.

Swiss aviation pioneer Bertrand Piccard is developing a plane powered by liquid hydrogen after a much-hyped flight in 2015 ...

The captured CO2 goes through the Sabatier reaction with hydrogen from electrolyzed water to produce methane and oxygen. Methane operates as rocket fuel within a looped operation that uses oxygen as ...

While this latest test doesn’t make nuclear-powered rocket engines viable just yet, it’s an important step on the journey.

Swiss aviation pioneer Bertrand Piccard is developing a plane powered by liquid hydrogen after a much-hyped flight in 2015 ...

Hydrogen is emerging as a promising fuel for rockets due to its potential for providing clean, powerful propulsion. Hydrogen-powered rockets utilize hydrogen gas as their fuel source, which is ...

Rocket thrusters powered by the hydrogen and oxygen in water do exist, and while NASA succeeded with using this kind of propulsion system to launch their PTD-1 CubeSat in 2021, water fuel has not ...

Rockets propelled by nuclear reactors ... to successfully test and demonstrate the survivability of fuel after thermal cycling in hydrogen representative temperatures and ramp rates," Christina ...

First conceived of in 1945, this is a rocket that replaces burning chemical fuel with a nuclear reactor that is used to heat up a propellant. This propellant is most likely hydrogen, though ...