A recent preprint paper examines the minimum number of people required to maintain a feasible settlement on Mars while accounting for psychological and behavioral factors, specifically in emergency situations. This study was conducted by a team of data scientists from George Mason University and holds the potential to help researchers better understand the appropriate conditions …

  • octoperson@sh.itjust.works
    link
    fedilink
    English
    arrow-up
    1
    arrow-down
    1
    ·
    1 year ago

    I don’t think Mars colonies are realistic, but not for this reason. Mars has about one third the gravity of earth, and a much thinner atmosphere, so you can return on a significantly smaller rocket than you launched with. It’s true that manufacturing a space rocket of any size would require basically an entire civilization, but there’s no reason you couldn’t bring the return vehicle with you, and only require manufacturing fuel or propellant on site.

    The top answer to this stackexchange post goes into a lot more detail on the practicalities https://space.stackexchange.com/questions/2820/how-big-would-a-manned-ascent-stage-for-mars-need-to-be

    • NeoNachtwaechter@lemmy.world
      link
      fedilink
      English
      arrow-up
      2
      arrow-down
      1
      ·
      1 year ago

      here’s no reason you couldn’t bring the return vehicle with you

      LOL. For example simply it’s weight is a reason. A vehicle for landing and a vehicle for starting may be the same, or may be two very different things because of their weight.

      And then bringing the vehicle is one thing, but starting it is quite something else again.

      • octoperson@sh.itjust.works
        link
        fedilink
        English
        arrow-up
        1
        ·
        1 year ago

        Most of the weight is fuel/propellant, which is why most Mars mission plans have you manufacture propellant on-site. An empty fuel tank and some engines isn’t that heavy. Especially if, as you say, you’re able to reuse your lander. Anyway, everything you bring has weight. The issue is, how much and can you budget for it?

        If your looking for somewhere to save weight, imo start by getting rid of the astronauts and all their associated life support and living space. Bonus - robots don’t even need frivolous luxuries like getting to return home.

      • AEsheron@lemmy.world
        link
        fedilink
        English
        arrow-up
        1
        ·
        1 year ago

        I mean, they will probably be relying on many unammed missions that deliver payloads to deliver all the construction material for the outpost before sending any people. While you’re at it you could send the return craft too.