The Solar System is a really big place, and it takes forever to travel from world to world with traditional chemical rockets. But one technique, developed back in the 1960s might provide a way to dramatically shorten our travel times: nuclear rockets.
Of course, launching a rocket powered by radioactive material has its own risks as well. Should we attempt it?
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References:
https://www.nasa.gov/directorates/spacetech/gamechangingdevelopment/NuclearThermalPropulsionDeepSpaceExploration
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19910017902.pdf
https://www.nasa.gov/directorates/spacetech/niac/2017PhaseIPhaseII/FusionEnabledPlutoOrbiterandLander/
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20170003126.pdf