Nuclear thermal rockets, at least twice as efficient as the best chemical ones, and are absolutely going to be used for space travel to the moon and Mars in the future. NASA was working on them in the 60s and early 70s but when the space race started to cool down they stopped. There’s been more money put into that stuff recently though
Nuclear thermal rockets, at least twice as efficient as the best chemical ones, and are absolutely going to be used for space travel to the moon and Mars in the future. NASA was working on them in the 60s and early 70s but when the space race started to cool down they stopped. There’s been more money put into that stuff recently though