Could you live on the moon? - Alex Gendler

510,253 views ・ 2018-06-05

TED-Ed


Please double-click on the English subtitles below to play the video.

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You roll out of bed and leap eight meters across your underground habitat.
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The greywater from your sink drains into a small greenhouse
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where your vegetables grow.
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After suiting up,
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you head through a transport chute to inspect the generator.
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Outside, it’s pitch black - just as it’s been for the last 12 days.
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This isn’t some post-apocalyptic scenario; it’s just another day of life on the moon.
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And with the European Space Agency’s idea
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to establish a functioning "moon camp" by the 2020s,
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that day may be closer than we think.
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Of course, living on the moon won’t be easy.
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The camp envisioned is not so much a village as an inhabited research base
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similar to those in places like Antarctica.
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But there are far greater obstacles to living on the moon than just cold weather.
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The biggest is cosmic radiation.
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Unlike the Earth, the moon has no atmosphere and no magnetic field.
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A person on its surface can receive over 400 times the maximum safe dosage
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of heavy ion radiation,
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enough to be fatal within ten hours, even in a spacesuit.
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The first step would likely involve robots
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and 3D printers constructing covered habitats from lunar soil,
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or building shelters inside caves
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formed by lava tubes from the moon’s volcanic past.
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But what would the inhabitants live on?
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Supplies would need to be transported from Earth at first.
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Growing plants requires greenhouse soil and air rich in carbon dioxide,
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a gas that’s rare on the moon,
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but could be synthesized from recycled materials.
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A water treatment plant could be supplied by ice mined from the polar regions
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using a specialized drill that can bore two meters beneath the lunar surface.
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Friendly bacteria and viruses necessary to the human microbiome and immune system
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would also have to be imported or synthesized on site.
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And lunar inhabitants would have to exercise for hours a day
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to maintain bone and muscle mass.
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That’s because the moon’s gravity is just one-sixth that of the Earth,
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and the everyday strain of working against gravity
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is part of what keeps our bodies healthy.
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It might seem strange to go to all this trouble
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to build a base on a dead rock we’ve already visited.
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But NASA’s Apollo missions only explored small portions of the moon.
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We’ve made many discoveries since then,
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such as ice near the poles and particles of solar wind gases
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that date back billions of years.
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They collectively show that the moon has much more to teach us
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about the history of our solar system.
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A radio telescope on its far side could observe the cosmos,
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shielded from the Earth’s electromagnetic interference.
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And the lunar surface is rich in minerals, like silicon, aluminum, and magnesium,
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creating great economic potential for mining.
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But the biggest benefit of the moon camp may not lie on the moon but beyond it.
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With the nearest possibly habitable world light-years away,
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and the International Space Station to be retired in about a decade,
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a moon base would be our first foothold
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towards becoming an interplanetary species.
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And proposals such as the Deep Space Gateway
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envision launching future missions from lunar orbit.
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The smaller gravitational pull would require less fuel to overcome,
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allowing for larger ships and more cargo.
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Meanwhile, the base on the surface could serve as a testing ground
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for future space operations,
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a refueling station,
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and a supply depot all in one.
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With Europe, Russia, China, and the US expressing interest in the project,
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the moon camp may come to involve
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the space agencies of all major nations, as well as private companies.
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Within a few decades,
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the moon may be bustling with mining operations,
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research stations,
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and tourist routes
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alongside a construction yard under an orbiting space port.
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We may have already visited the moon,
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but now we’re closer than ever to making it part of humanity’s home.
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