Times are changing, what with the renewing of space exploration. Humanity should be un-arse-ing itself and moving towards our celestial neighbours. But we will only go to them, if we harness a better power souce. That, my friends, is good old nuclear propulsion. And yet, there are so many catagories of that type, that I want to know your opinions of which sub-catagory you like. The choices of which type you choose are listed here: 1) Nuclear Thermal Propulsion; This group includes KIWI, ROVER, and NERVA type rockets. 2) Nuclear Pulsed Propulsion; Includes both the ORION and DAEDALUS projects. 3) Nuclear Electric Propulsion; Basically, using a nuclear reactor to power an ion engine similar to the DS1/NSTAR variant. 4) Hybrid Thermal/Electric Propulsion; A combonation of 1. and 3., it could allow the escape from planets' gravity-wells, and interplanetary travel. Decide and state your opinion(s).