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Space Race

Discussion in 'Science' started by sonick_25, Jun 17, 2020.

  1. sonick_25

    sonick_25 Member

    Aug 26, 2005
    A long long time ago
    in a time far far away
    there was a so called space race.
    In Oct. 4, 1957 a soviet satellite was launched.

    I believe the space race has just begun.
    It so expensive for anyone to compete with specially when its going to come out of your own pocket with no return on investment. As you can see Elon Musk Is doing well and will get return on investment once his project is complete as clearly everyone wants super fast internet.
    So its only been Countries governments that have been up to the task.
    I do think tho its just the beginning and soon we will see companies on the ground forming to complete construction tasks and with all the new materials that are now at hand it should become interesting times.
    Its hard to get materials up to space but once there i think it will be easy to build once we make the right tools.
    If we had an elevator would it just fall back down or would some sort of vacuum hold it up there?
  2. Quadbox

    Quadbox Member

    Jun 27, 2001
    We've been "close to having the technology to be able to build a space elevator" for fifty years, it's unlikely to ever happen on earth. The moon's possible, but *why*, mars is probably possible, but once again you'd really want to have a good economic reason for it. The miniscule tether experiment they're running is about as far from a space elevator as the gemini 11 tether experiment back in 1966, it'll provide data that's way more useful to vaguely near-term practical things like tethered satellites than it is for a space elevator

    In order for them to actually physically work, they have to extend out beyond geostationary orbit (exactly how far depends how big a rock you leave on the end of it. Or more likely the middle of it. But it's a long way past geostationary orbit (GEO, ~35000km altitude) in any case). Anything released from the cable on this side of GEO wont have the tangential velocity for a circular orbit at that altitude, so it'll be in an elliptical orbit that will EITHER stay in orbit, OR intersect the earth's atmosphere and reenter. Anything released at exactly GEO's going to go approximately nowhere (it'll be in a halo orbit), anything released above that will have more orbital velocity than it actually needs, and would be flung out to a higher orbit. (also elliptical)

    Everything that is in orbit is falling. They're just moving fast enough they're missing the earth constantly. If you (somehow) could have a stationary object up there and let it go it would just fall back to earth. Vaccuum isnt a contributor to this beyond the fact it's very hard to have something move that fast in atmosphere without burning up. Difficult enough at mach 7, this is far faster.

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