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@Pinboard

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 18
      Replying to @Robotbeat @dingir_bhaak

      Cosmic ray radiation levels in low earth orbit are 2-4x lower than in a Mars transit, and a Mars transit would take six months, not 3-4.

      1 reply 0 retweets 0 likes
    2. Robotbeat 🗽 ➐‏ @Robotbeat Oct 18
      Replying to @Pinboard @dingir_bhaak

      Wrong. The trip time is a function of the rocket architecture, you know the part you think is just the fun part that isn’t the REAL issue. ;) SpaceX’s ITS/BFR/Starship would take as few as 80 days to transit, depending on the year. https://www.spacex.com/media/making_life_multiplanetary_2016.pdf …pic.twitter.com/oiAIp3EIus

      1 reply 1 retweet 8 likes
    3. Pinboard‏ @Pinboard Oct 18
      Replying to @Robotbeat @dingir_bhaak

      I go by the NASA design reference architecture because Musk has a very long history of making shit up.

      1 reply 0 retweets 0 likes
    4. Robotbeat 🗽 ➐‏ @Robotbeat Oct 18
      Replying to @Pinboard @dingir_bhaak

      Oh, okay, good to know you think SpaceX, who is the only US company NASA trusts to launch humans to orbit right now, just makes stuff up & is ignoring radiation (versus addressing it with the perfectly valid method of using more fuel and aero braking to do a faster transit time).pic.twitter.com/muvofQA6ED

      2 replies 0 retweets 12 likes
    5. Pinboard‏ @Pinboard Oct 18
      Replying to @Robotbeat @dingir_bhaak

      I think it's silly to argue about transit times for a rocket that doesn't exist. Until it does, I'm using the reference plans from the one group that has landed humans on another celestial body.

      3 replies 0 retweets 0 likes
    6. Casey Handmer, PhD‏ @CJHandmer Oct 18
      Replying to @Pinboard @Robotbeat @dingir_bhaak

      This is the same orbital dynamics anyone has to deal with. 4-6 months is very doable. Regarding radiation, if only someone had written a blog on it...pic.twitter.com/o5TvpmCHza

      2 replies 0 retweets 8 likes
    7. Casey Handmer, PhD‏ @CJHandmer Oct 18
      Replying to @CJHandmer @Pinboard and

      https://caseyhandmer.wordpress.com/2019/10/20/omg-space-is-full-of-radiation-and-why-im-not-worried/ …

      2 replies 1 retweet 11 likes
    8. Pinboard‏ @Pinboard Oct 18
      Replying to @CJHandmer @Robotbeat @dingir_bhaak

      The specific issue threatening Mars missions is how bone injury from deep-space radiation couples with bone loss from microgravity. They are different mechanisms and we simply don't know how they interact.

      2 replies 0 retweets 0 likes
    9. Potoober‏ @Bobby_Corwin Oct 18
      Replying to @Pinboard @CJHandmer and

      and the only way we're going to learn it is to do it.

      2 replies 0 retweets 0 likes
    10. Potoober‏ @Bobby_Corwin Oct 18
      Replying to @Bobby_Corwin @Pinboard and

      otherwise, the radiation is equal to a pack of cigs a day. so if we just grab smokers off the street and jam them in the rocket without cigs, they'll be no worse off.

      1 reply 0 retweets 0 likes
      Pinboard‏ @Pinboard Oct 18
      Replying to @Bobby_Corwin @CJHandmer and

      The radiation is qualitatively different from what we can study in humans on earth. People are glib about it but it's not just a question of how much cancer risk you accept.

      11:58 AM - 18 Oct 2021
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Potoober‏ @Bobby_Corwin Oct 18
          Replying to @Pinboard @CJHandmer and

          sure, and I don't remember seeing Gateway's scientific docket having anything to study that specifically. there are some studies that light shielding is worse than no shielding at all (sprayed with daughter particles besides one cosmic ray that goes through).

          1 reply 0 retweets 1 like
        3. Robotbeat 🗽 ➐‏ @Robotbeat Oct 18
          Replying to @Bobby_Corwin @Pinboard and

          The light shielding thing is mostly not that big of a deal.pic.twitter.com/MH2GCQA4aq

          1 reply 0 retweets 0 likes
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