4 futuristic space technologies — and when they might happen – Solar farms in orbit, nuclear power on the moon, space elevators and interstellar travel — which might we see happen first?

From the article

>Middleburgh is working with the [U.K. Space Agency and Rolls-Royce](https://www.space.com/moon-rolls-royce-nuclear-reactor-concept-unveiled) to develop a nuclear fission reactor that could fly to the moon on a future mission. Rolls-Royce have considerable experience working with nuclear reactors, since they outfit the U.K.’s nuclear submarines with them.

>”The aim for the reactor energy output would be of the order of 100–300 kilowatts in combined heat and electrical power – both of which would be extremely useful up there [on the moon],” Middleburgh said. “This is an enormous amount of power compared to previous missions, and as the site [for a lunar base] grows, we may want to build a second or third system that will also provide assurance of energy supply. But we won’t be building 100 megawatt systems any time soon.”