How long can a human live unprotected in space?

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	How long can a human live unprotected in space?

sohil

7-4-2007 10:44 AM

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space, astronomy, science, research, nasa, human, live, life, human body

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/3a1c9d9e-8058-4a4a-b15a-aced2af6b7f3/4F604C31-E8AC-4CAB-93E5-E402BE5E24B1/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html" href="http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html" style="font-size: 11px;">imagine.gsfc.nasa.gov</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html"><P>
How long can a human live unprotected in space?
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html"><P>
If you don't try to hold your breath, exposure to space for half a
minute or so is unlikely to produce permanent injury. Holding your
breath is likely to damage your lungs, something scuba divers have to
watch out for when ascending, and you'll have eardrum trouble if
your Eustachian tubes are badly plugged up, but theory predicts --
and animal experiments confirm -- that otherwise, exposure to
vacuum causes no immediate injury. You do not explode. Your blood
does not boil. You do not freeze. You do not instantly lose
consciousness.
</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html"><P>
Various minor problems (sunburn, possibly "the bends", certainly
some [mild, reversible, painless] swelling of skin and underlying
tissue) start after ten seconds or so. At some point you lose
consciousness from lack of oxygen. Injuries accumulate. After
perhaps one or two minutes, you're dying. The limits are not really
known.
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