Space colonies and travel basically mandate some sort of nuclear power. RTGs (a sort of poor man's reactor that isn't a reactor) were used for several Mars vehicles and are also why the Voyager satellites are still transmitting data more than 40 years later. Solar becomes exponentially less viable as you move away from the sun.
Space colonies and travel basically mandate some sort of nuclear power. RTGs (a sort of poor man's reactor that isn't a reactor) were used for several Mars vehicles and are also why the Voyager satellites are still transmitting data more than 40 years later. Solar becomes exponentially less viable as you move away from the sun.