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 ...

No hydrogen-oxygen rocket of appreciable size has flown so far, but for a year Aerojet-General Corp. has been ground-testing hydrogen rocket motors at its Sacramento plant.

NTP was first theorized in the 1940s. Instead of burning chemical propellant, a rocket would use a nuclear reactor to heat propellant – most likely hydrogen.

But oxygen is typically the heavier component of rocket fuel combinations—typically about 80 percent of the mass—and so, is the bigger challenge to get to a fuel depot.) ...

New material allows for better hydrogen-based batteries and fuel cells Date: January 2, 2024 Source: RIKEN Summary: Researchers have developed a solid electrolyte for transporting hydride ions at ...