[SketchySeaBeast]

> "The massive amount of energy produced by these reactors could be used to sustain human outposts on other worlds and cut the travel time to Mars in half.

>“Many space exploration problems require that high-density power be available at all times, and there is a class of such problems for which nuclear power is the preferred—if not the only— option,”

It seems that nuclear reactors has more utility than simple power to weight ratio.

[mlindner]

Nuclear reactors will be needed if you're going much further out than Earth/Mars. Solar power falls off rapidly as you go further out.