I'm surprised they didn't mention creating artificial "gravity" via centrifugal force of spinning the ship as it travels. I know there is a lot of engineering to make that a reality but theoretically a potential strategy to combat that piece anyway.
It's zero gravity and radiation. There's a good solution for the former. The latter, not so much.
Right, I got that which is why I wrote, "that piece anyway". I haven't looked too far into the radiation aspect and why heavy shielding isn't viable. I'm guessing it depends on the type of radiation. Another interesting rabbit hole for me to follow. ;)
Lead lining a cramped "safe room" for solar storms would be somewhat viable. Lead lining the entire craft to account for constant low level radiation is the issue.
The earth has the magnetosphere to protect from that constant low level radiation.
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