Space Elevator By 2035, Says International Academy of Astronautics
2014 03 10
By Red Ice Creations
Going up? Way up?
The space elevator - An idea which used to be pure speculative science fiction has gained renewed interest.
ExtremeTech.com lays out the technical challenges of the audacious (crazy?) plan to extend the 100,000-kilometers-long tether into space. Especially problematic to the mission is the fact that the materials and technology needed to create the space elevator don’t actually exist yet!
One problem at a time, we suppose.
Imagine a ribbon roughly one hundred million times as long as it is wide. If it were a meter long, it would be 10 nanometers wide, or just a few times thicker than a DNA double helix. Scaled up to the length of a football field, it would still be less than a micrometer across — smaller than a red blood cell. Would you trust your life to that thread? What about a tether 100,000 kilometers long, one stretching from the surface of the Earth to well past geostationary orbit (GEO, 22,236 miles up), but which was still somehow narrower than your own wingspan?
The idea of climbing such a ribbon with just your body weight sounds precarious enough, but the ribbon predicted by a new report from the International Academy of Astronautics (IAA) will be able to carry up to seven 20-ton payloads at once. It will serve as a tether stretching far beyond geostationary (aka geosynchronous) orbit and held taught by an anchor of roughly two million kilograms. Sending payloads up this backbone could fundamentally change the human relationship with space — every climber sent up the tether could match the space shuttle in capacity, allowing up to a “launch” every couple of days.
[...]A space elevator is relevant to scientists, telecoms, and militaries alike — and with Moon- and asteroid-based mining becoming less hare-brained by the minute, Earth’s notorious resource sector could get on-board as well. It will certainly be expensive, probably the biggest mega-project of all time, but since a space elevator can offer a solid value proposition to everyone from Google to DARPA to Exxon, funding might end up being the least of its problems.
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