Nuclear power sources (NPS) for use in outer space have been developed and used on spacecraft where unique mission requirements and constraints on electrical power and thermal management precluded the use of non-nuclear power sources.
在对于电力和热管理具有独特要求和限制的空间飞行任务中，无法使用非核动力源，因而核动力源用于外层空间得到发展并用于航天器。