Editing Nuclear electric rocket (section)

==Other types of nuclear power concepts in space==
{{main|Nuclear power in space|Nuclear propulsion|Nuclear pulse propulsion}}
[[Radioisotope thermoelectric generators]], [[radioisotope heater unit]]s, [[radioisotope piezoelectric generator]]s, and the [[radioisotope rocket]] all use the heat from a static radioactive source (usually [[Plutonium-238]]) for a low level of electric or direct propulsion power. Other concepts include the [[nuclear thermal rocket]], the fission fragment rocket, [[nuclear pulse propulsion]], and the possibility of a [[fusion rocket]], assuming that [[nuclear fusion]] technology is developed at some point in the near future.{{citation_needed|date=July 2019}}