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 ...

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.

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.

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 ...

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.) ...