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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. 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
    2. 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
    3. 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
    4. 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
    5. 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
    6. 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
    7. Pinboard‏ @Pinboard Oct 18
      Replying to @Bobby_Corwin @CJHandmer and

      Yeah, but this is NASA we're talking about—we're going to do it by having a long and cautious series of what are basically deep-space ISS missions.

      3 replies 0 retweets 0 likes
    8. Potoober‏ @Bobby_Corwin Oct 18
      Replying to @Pinboard @CJHandmer and

      unless NASA becomes a governing body of space exploration for the USA (besides FAA?) SpaceX will go without them when they have the capability (saying that, NASA and the US government will 100% force spacex to have nasa astronauts if that happens to save face)

      1 reply 0 retweets 1 like
    9. Pinboard‏ @Pinboard Oct 18
      Replying to @Bobby_Corwin @CJHandmer and

      I believe SpaceX will promise Mars is four years away for the remainder of our natural lives.

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

      that's a poor belief to have. or you're really old, then its valid. I'd be surprised if humans don't make it by the close of the 2030/very early 2040. bar any political torpedos. as it stands, SpaceX will make it.

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

      2040 is a no-go for orbital and space weather reasons. If I remember right you need to do this by 2035 or wait until 2041.

      12:13 PM - 18 Oct 2021
      2 replies 0 retweets 0 likes
        1. New conversation
        2. Potoober‏ @Bobby_Corwin Oct 18
          Replying to @Pinboard @CJHandmer and

          I was talking decades spacex wants to send unmanned on the next available alignment, realistically it be the one after that (2026) with people the one after that (2028). even if it's 'elon time' it'll still be the early 2030s for people on mars.

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

          Yup. And I think NASA will go with, just like they’re using Starship for going to the Moon.

          1 reply 0 retweets 1 like
        4. Show replies
        1. New conversation
        2. Casey Handmer, PhD‏ @CJHandmer Oct 18
          Replying to @Pinboard @Bobby_Corwin and

          There's a launch window every 2.2 years.

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

          The orbital energetics are bad in that period, and it's a solar maximum.

          1 reply 0 retweets 0 likes
        4. Show replies

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