Too bad "NERVA" never was developed for unmanned missions like this. Forget the little thermocouple can for electricity - give me an ENGINE, "Heinlein" style!

Too bad "NERVA" never was developed for unmanned missions like this. Forget the little thermocouple can for electricity - give me an ENGINE, "Heinlein" style! https://en.wikipedia.org/wiki/NERVA https://en.wikipedia.org/wiki/NERVA