Thanks, I enjoyed that. This needs to be solved before ringworlds and manned space travel are possible.
What we really need are generators that can manipulate gravity itself. Bob Lazar claims we already have this technology recovered from alien spacecraft. It's an antimatter reactor powered by a stable isotope of Moscovium 115 that is able to manipulate gravity and negate inertia. His claims are now 40 years old and many have come true. He predicted Moscovium 115 before it was discovered.
The biggest challenge is going to build a shield for all these deadly cosmic rays. Unless you build a spacecraft with 3 meters thick lead walls.
That's solvable with EMF generators, really, really powerful EMF generators strong enough to mimic the earth's magnetosphere.
That's the theory. In practice it would take a huge amount of energy to generate a field that can block cosmic radiations. And we'd have to do the same on the Moon and Mars.
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