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Space Forum / Astronomy / July 2008Human Body in Space
Would like a scenario to a person blown out of a space ship air-lock with no space suit. Thanks in advance. Bert > Would like a scenario to a person blown out of a space ship air-lock > with no space suit. Thanks in advance. Bert From what i've read Bert, this wouldn't be very much fun... At first, a person would be fully conscious, but very uncomfortable. All the moisture in his extremities, including his eyes and mouth, shoots off because water is instantly turned into vapor. Then after about 10 seconds, he has impaired vision and judgement because his lungs have been dumping oxygen out of his bloodstream due to the vacuum of space. He will only live this long if he exhaled all his breath during the first few seconds. If he didn't, then his lungs would very quickly "pop". After about 15-20 seconds, he'd lose consciousness, and then die of hypoxia, the lack of oxygen in body tissue. Soon after, the loss of heat kicks in, and he will eventually freeze. Temperature actually wouldn't be an immediate problem, though. Space is extremely cold, true, but it's also a vacuum, so his body heat would not "seep" or radiate away. As a result it would be quite warm. He would still lose a little heat through radiation, but a person would lose more heat more quickly here on Earth. happy days and... starry starry nights!  SignatureIndelibly yours, Paine Ellsworth P.S.: Thank YOU for reading! P.P.S.: http://painellsworth.net Painius Thanks I see heat radiating away in space with its temp only 2.7 K Faster than on Earth I thought his body would explode so fast he would have no thinking time Bert > From what i've read Bert, this wouldn't be very much > fun... [quoted text clipped - 20 lines] > a person would lose more heat more quickly here on > Earth. There was an interesting thread on here about 10-11 years ago on this very subject. Quite a few myths were dispelled, including the popular idea that the body would immediately "explode" from depressurization. Moisture wouldn't actually "shoot off" either, but would boil (from depressurization), first noticible in the saliva and mucous membranes directly exposed to space vacuum. It would take longer for dissolved gases in the blood etc. to come out of solution. In the making of that movie, '2001 a Space Odyssey', the writer had actually done his homework where he had the actor without a spacesuit on, moving through the vacuum to get inside that airlock quickly. oc Interesting I had the idea the body would explode. Reason for that is the body is 73% water,has gas in it,and just about immediately pop. in the vacuum Bert > Interesting I had the idea the body would explode. Reason for that > is the body is 73% water, has gas in it, and just about immediately pop > in the vacuum Well Bert, since you're familiar with scuba diving, look at it this way- when you scuba dive, water pressure can be 3 or 4 atmospheres, right? (One atmosphere being 14.7 psi.) When you surface, you've experienced a pressure drop of multiple atmospheres. Do you explode when you come to the surface? Nope. Now if you go from one atmosphere to pure vacuum, you experience a drop of only `one` atmosphere (same as coming up from water depth of 33 feet). This is much less severe than pressure differences encountered in ordinary scuba diving. In spacecraft and spacesuits, pressure is maintained at considerably less than 1 atmosphere. So the pressure difference is even less severe if you were suddenly popped into pure vacuum. oc When down 33 feet you are at a pressure of two atmospheres. You come to the surface you are at one atmosphere of 14.7 psi Seems oc going into the vacuum of space with no atmosphere(pressure) that is a lot worse than a scuba diver gets. I've been down about 40 feet for 15 minutes and felt no discomfort in that change of pressure. But like you I thought over scuba diving to relate this with. Best to realize in hard hat diving if his suit is cut and he loses inner pressure he ends up in the metal helmet. Its called the squeeze That's sickening Bert People who climb buildings sometimes fall off, BEERTbrain! lmao! That's part of the game they play. And don't forget parachutists! Damn, it didn't open... SPLAT! Saul Levy >oc When down 33 feet you are at a pressure of two atmospheres. You come >to the surface you are at one atmosphere of 14.7 psi Seems oc going [quoted text clipped - 5 lines] >up in the metal helmet. Its called the squeeze That's sickening >Bert > ...in hard hat diving if his suit is cut and he loses inner pressure he ends > up in the metal helmet. Its called the squeeze That's sickening Wouldn't that be prevented by a one-way check valve in the hose connection? oc I'm sure a hard hat diver's valve is a butter fly valve. His hard hat and suit are one piece,and if there is not pressure in the suit it gets squeezed. Think of a tube of tooth paste Hard hat can go deeper and stay down longer but I'll stick with scuba. Lot safer and you can see a lot more Can't help thinking about sting rays typing this,and glad I never got to close to them Bert > Would like a scenario to a person blown out of a space ship air-lock > with no space suit. NASA sezz... http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970603.html |
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