Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 decade ago

human hazardous in space?

what hazardous do humans face when they are in space?

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  • Anonymous
    1 decade ago
    Favorite Answer

    First, the obvious one. We need to maintain an Earth-like bubble of environment within the Shuttle, or Space Station, or whatever it is that a human is in. "Outer space" is very cold, and essentially a perfect vacuum, with no atmospheric pressure, and no breathable gases. A person wouldn't last very long just floating free in open space (see first link below). Also, if you're going to spend any real length of time in space, you need a way to keep up this bubble, and to maintain water, an oxygen, and food. Water isn't 100% recycled right now. It's pretty good, but not 100% Oxygen generators and carbon dioxide scrubbers, again, are pretty good, but far from perfect. As for food... there is no way to recycle food. You eat food and gain the chemical energy that had been stored in you food to power your body, and then, when you're done... we all know what happens to food when we're done. It's complete waste, almost totally stripped of nutrients, and there's nothing to do about it but compact it in your space toilet and throw it away, or dispose of it in some other way when you land.

    You also need to consider the near absence of gravity in space and the presence of very high-energy, gamma-ray and ionizing cosmic-ray (called HZE) nuclei is another. Zero gravity causes the muscles of the body to atrophy (get weaker), from heart to bicep, and our bones rapidly lose mass, making is more brittle. HZE is known to be very bad for us, but since we can't really produce them ourselves down here on the surface to study, the International Space Station is sort of a morbid laboratory, just watching what happens to humans who are exposed to gamma-ray and HZe. Incidentally, we're happy down here on the surface because Earth's magnetosphere takes care of bouncing the gamma- and cosmic-radiation away from us, where those energies almost never sneaks a single photon through.

    This one is a bit out there... but if the astronauts and cosmonauts were up there, and someone set off a nuclear weapon in the upper atmosphere, all of their electrical equipment would be instantaneously fried beyond any possibility of repair. Replacement parts would be equally dead. But really, not to worry, because the does of radiation that our intrepid men and women would receive from such a blast is many times more than what they'd receive from the same blast on the surface, so they would probably die within only a few hours, long before they suffocated.

    Finally, in Earth Orbit (Low, High, and Geosynchronous), there's a lot of artificial trash floating around there are velocities of kilometers per second - you get hit with something the size of a marble, and you're very dead. Anything larger probably blows you apart. Outside of our orbit, say, going to Mars, things aren't much better. Micrometeorites are whizzing around all over the place with plenty of velocity to go straight through your spaceship. Even if they don't punch dangerous holes themselves, they have a "sand-blasting" effect, which could obviously be bad in and of itself.

    Getting into space is just inherently dangerous. Orbiting is dangerous. Flying to the Moon is more dangerous, and attempting to fly to Mars is *incredibly* dangerous.

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  • Anonymous
    1 decade ago

    The vacuum first front and foremost will kill you. There's also no friction to stop a moving object, so if you accidentally hit something or pushed on something, you will go the opposite direction forever unless some other force hits you. So there's a chance you'll get lost forever wandering. There's also black holes, (if you were lucky or unlucky enough to get that far in space) that bends space time in an extreme manner that light cannot even escape... Pretty scary dangerous place you know.

    Source(s): My own knowledge from reading, watching things lol :)
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  • (:P)
    Lv 6
    1 decade ago

    Perhaps one of the most common hazards would be self generated gas emissions in a controlled airspace.

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  • 5 years ago

    no air

    no food

    no water

    solar wind

    asteroids

    solar radiation

    black holes

    temperate

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