Quote there are more nuclear powered spacecraft than you think. ion propulsion is being used on at least one craft as we speak. i think you,re confusing cooled power generating reactors with space craft equipped with nuclear electrical generating power sources. these have radiation cooling, but i don,t think they need liquid cooled cores. nuc power is the only solution to long distance manned space flight. chemical propulsion and solar power just don,t have enough energy. there are also other nuc propulsion options that don,t violate treaties.Quote
Can some one explain this better
