Space nerds, has SpaceX talked publicly at all about the en-route obstacles to a Mars mission (radiation, deconditioning, closed-loop life support) and how it plans to address them? I can find stuff about launch and landing but not the middle part that is the actual dealbreaker.
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Replying to @Pinboard
AFAIK radiation isn't really an issue (small hardened shelter for solar storms + accepting some increase in cancer risk over decades), life support is non-trivial, but there's the ISS experience and initially it'll be a few people on a vehicle sized for 100, so lots of margin.
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Replying to @Almoturg
Radiation is in fact a very serious issue, since we know little of the effects of long-term exposure to cosmic rays outside the magnetosphere. It's a direct risk but also indirectly compounds the bone loss and vision problems.
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Replying to @Pinboard
It's not going to kill them on the way or in the first months/years on Mars, so I don't see how it would stop the first missions. Might be different for long term settlement, but I don't believe that's feasible anyway.
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It might compound bone loss to the point where someone breaks a hip on Mars, or severely degrade eyesight. Those are the mission risks.
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