Destined for Mars and beyond, NASA’s Space Reactor-1 (SR-1) Freedom will be humanity’s first fission-powered spacecraft to travel outside Earth’s orbit. Announced during NASA’s “Ignition” event, this mission will demonstrate nuclear electric propulsion in deep space, and progress is underway on ...
Source: [NASA](https://www.nasa.gov/centers-and-facilities/glenn/sr-1-freedom-advances-with-progress-on-nuclear-power-module/)