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Do not attempt to compete with Pinboard. http://pinboard.in  maciej@ceglowski.com +1 415 610 0231

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    1. Pinboard‏ @Pinboard Oct 17

      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.

      13 replies 6 retweets 75 likes
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    2. Paul Klinger‏ @Almoturg Oct 17
      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.

      1 reply 0 retweets 5 likes
      Pinboard‏ @Pinboard Oct 17
      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.

      4:26 PM - 17 Oct 2021
      • 6 Likes
      • m collapse informatics Interim CEO of CHOAM adamjodonnell
      3 replies 0 retweets 6 likes
        1. New conversation
        2. Paul Klinger‏ @Almoturg Oct 17
          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.

          1 reply 0 retweets 2 likes
        3. Pinboard‏ @Pinboard Oct 17
          Replying to @Almoturg

          It might compound bone loss to the point where someone breaks a hip on Mars, or severely degrade eyesight. Those are the mission risks.

          0 replies 0 retweets 2 likes
        4. End of conversation
        1. Forrest‏ @Forreststargaze Oct 18
          Replying to @Pinboard @Almoturg

          we know way more about long term exposure then what a 3 month journey will expose passengers to

          0 replies 0 retweets 1 like
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        1. Eniac‏ @hallotria Oct 18
          Replying to @Pinboard @Almoturg

          Cosmic rays are not stopped by the magnetosphere. They are stopped by the Earth, so reduced no more than half in Low Earth orbit vs interplanetary space. Shelter is needed for solar flares, which are stopped by the magnetosphere. They are directional, though, so easy to shield.

          0 replies 0 retweets 0 likes
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