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Engineering Materials
Slideshow: Plastic Can Protect Astronauts
7/16/2013

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The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) contains tissue equivalent plastic (TEP), a conducting thermoplastic that simulates the photons and neutrons of a wide range of energies as found in soft body human tissues. This material has been found to reduce radiation from galactic cosmic rays, and could be used to shield astronauts on longer space voyages.   (Source: NASA/University of New Hampshire)
The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) contains tissue equivalent plastic (TEP), a conducting thermoplastic that simulates the photons and neutrons of a wide range of energies as found in soft body human tissues. This material has been found to reduce radiation from galactic cosmic rays, and could be used to shield astronauts on longer space voyages.
(Source: NASA/University of New Hampshire)

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Cadman-LT
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Re: Sci-Fi solutions
Cadman-LT   7/16/2013 1:03:46 PM
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naperlou, I think you are wrong. Further from the Sun, really. I just don't buy that. Cosmic raditaion is out there, everywhere in space. Shielding is not just important, it is a necessity for people to survive long periods of time in space. You are assuming that all of the radiation comes from the Sun however, which I believe to be false(and is). Those people who are brave enough to stay in space for those periods of time know the consequences. Everything that can be done to minimalize that exposure to radiation should be done.

Cadman-LT
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Re: Sci-Fi solutions
Cadman-LT   7/16/2013 12:51:33 PM
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Ann, forgot to mention great article. Love reading your stuff.

Cadman-LT
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Re: Sci-Fi solutions
Cadman-LT   7/16/2013 12:50:03 PM
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Warren, I agree. It has always been at the top of the list of problems facing astronauts as much as I can recall. Having to hide in case of a solar flare, etc. They need protection if they ever want to make it to Mars. The old astronauts used to say when they closed their eyes they saw little sparks of light....radiation. Not good. This is a step in the right direction to protecting those brave enough to go out there. naperlou, the case I metioned earlier where they had to hide from a solar flare...if I recall correctly was on the ISS.

Ann R. Thryft
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Re: Sci-Fi solutions
Ann R. Thryft   7/16/2013 12:46:08 PM
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The main source of radiation in space that we must protect astronauts against is cosmic rays, specifically galactic cosmic rays (GCR). As we mention in the article, these are far more damaging to humans than any radiation we experience on Earth, from any source. The lack of enough protection for astronauts on extended voyages is often mentioned as one of the main reasons we haven't sent people to Mars yet.

naperlou
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Re: Sci-Fi solutions
naperlou   7/16/2013 10:39:40 AM
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Warren, I am not sure it is as bad as you think.  As you get further out from the source the density of the radiation decreases.  Exploration further from the sun should be safer, assuming that the sun is the main source of the radiation.  We have had astronaughts in space for some time now and the ISS allows us to have people in orbit for longer periods of time.  Shielding is important, but it's need should not deter us.

warren@fourward.com
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Sci-Fi solutions
warren@fourward.com   7/16/2013 8:50:03 AM
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As a kid, and as an adult, I loved and love science fiction.  I think it had a lot to do with me becoming an engineer.

But I was always troubled by the scientific inconsistencies.

One book had a moon landing using parachutes.  I knew better than that as a 10 year old.  And there are many more issues raised.

But the radiation thing has bothered me a lot.  I am a big fan of a trip to Mars, but I don't want corpses arriving there or here.  It should not be a suicide mission, although I suspect there would still be plenty of volunteers!

The shielding issue is major.  Not only is the "Moon a harsh mistress" but all of "empty" space is a dangerous mine field.  Good luck solving all those problems!

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