NASA, DARPA Partner with Industry on Mars Rocket Engine ( www.nasa.gov )
en.m.wikipedia.org/wiki/Nuclear_thermal_rocket
Hydrogen expelling nuclear space flight. 2 to 3 times more efficient than chemical engines
![](https://kbin.cafe/media/cache/resolve/entry_thumb/ae/5e/ae5eface8a656db724f388ef03b9eff588294d980a5f077047c05cd4544879bf.jpg)
en.m.wikipedia.org/wiki/Nuclear_thermal_rocket
Hydrogen expelling nuclear space flight. 2 to 3 times more efficient than chemical engines