Nuclear thermal rockets are much more interesting IMO because they were actually viable and in development until Nixon killed them for no good reason. They're c

Nuclear thermal rockets are much more interesting IMO because they were actually viable and in development until Nixon killed them for no good reason. They're coming back now though. https://en.wikipedia.org/wiki/NERVA https://en.wikipedia.org/wiki/NERVA https://spacenews.com/momentum-grows-for-nuclear-thermal-propulsion/ https://spacenews.com/momentum-grows-for-nuclear-thermal-pro... (2019)