strung out
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ta!
How long can a human live unprotected in space?
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ATOMIC SUPLEX
Member Since: 1985 Post Count: 3
Doctor who managed it in four to doomsday.
strung out
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didn't he use a cricket ball to propel him through space that time?
ATOMIC SUPLEX
Member Since: 1985 Post Count: 3
Um yes I think so, something like that.
ATOMIC SUPLEX
Member Since: 1985 Post Count: 3
Um yes I think so, something like that.
stuff_it
Too skool for cool
la ressistance
aesthete
I want to be executed for mutiny by being ejected from a spaceship cargo bay. I would defiantly scream I REGRET NOTHING, before my cries are deafened by the vacuum of space.
(then with my dying seconds I would pretend to swim away from the ship)
I expect it would involve major pain in your guts from the gasses expanding. Most internal tissues have pain receptors etc arranged to generate pain from stretching rather than cutting. This is why high doses of anaesthetics are needed during the initial stages of an operation then reduced once they are through the body wall (at least in procedures on animals). Imagine the worst trapped wind possible...
What about frostbite? fluids boiling off mucous membranes would cause rapid cooling but would this be enough to cause freezing??
What about frostbite? fluids boiling off mucous membranes would cause rapid cooling but would this be enough to cause freezing??
weltweit
Well-Known Member
Thing is, the space suits that the lunar astronauts wore not only protected themselves from the temperature but also they were very heavy which prevented them floating off into space as the gravity on the moon is just 16.6% what it is on earth.
No idea what the relative gravity is on mars though, but if it is low you might just float up up and away!
bluestreak
HomosexualityIsStalin’sAtomBombtoDestroyAmerica
weltweit
Well-Known Member
I was wondering if someone could operate on the moon in just a facemask which provided air to breathe and weighted shoes to keep them on the deck. Perhaps in a fully covering boiler suit. It would mean the majority of their body would be exposed to the lack of pressure and unfiltered sunlight though.
EastEnder
Brixton Barnacle
Escape velocity on the surface of the moon is 2.4 km/s. That's about 2.5 times the muzzle velocity of a high powered rifle. I don't think you need a heavy suit to prevent floating off into space...
Crispy
The following psytrance is baṉned: All
Still no good - pressurised air in the lungs (needed for breathing) would make them rupture in the vacuum.
Mungy
i haz boobz
weltweit
Well-Known Member
That is interesting, but I recall seeing astronauts bouncing about on the moon and they seemed to bounce a lot. 2.4 km/s is a lot!
Aha. But the air in their lungs might not be very pressurised, it would just be fed from a face mask a la underwater diving gear. Possibly.
EastEnder
Brixton Barnacle
Bouncing up and down a few feet is not quite the same as floating off into space. If you fired a gun vertically on the moon the bullet would travel far further than on the earth, but it would still fall back down to the ground.
The minimum safe partial pressure of oxygen required for respiration is about 0.16 bar. Even at that pressure, in the absence of the external force exerted by an atmosphere, the interior of your lungs would be forced outward with a pressure of 2.32 psi. That's 2.32 pounds pushing outward on every square inch. More than enough to rip the lungs apart.
editor
hiraethified
An update from the Bioastronautics Data Book saying what would happen if you got lobbed out into space without a suit.
http://www.gizmodo.co.uk/2012/07/what-really-happens-when-you-get-sucked-out-of-an-airlock/
EastEnder
Brixton Barnacle
Unless you got sucked out of a forward facing airlock on a ship undergoing acceleration, such as on approach to docking with a space station, in which case you'd drift away a bit before the ship caught up and bashed into you. At which point you'd bounce off, drift away some more, then be bashed again, and so on. Probably worth checking the airlock is securely locked next time.
8ball
Decolonise colons!
krtek a houby
Merry Xmas!
I so wish I'd been called "David", just so I could get my 'puter to say "Hello Dave..." every morning. The novelty would never wear off.
Pickman's model
Starry Wisdom
A driver's mask?
2hats
Dust.
Back to the walking on Mars fantasy...
Unfortunately the surface dust appears to be a super oxide. You really don't want to be kicking that up and getting it on your skin, let alone in the nice moist linings of your lungs (lunar dust is bad enough).
Additionally, a major problem with human missions to Mars is going to be forwards as well as backwards contamination. It's hard to see how we could meet the UN Outer Space Treaty/COSPAR planetary protection requirements; astronauts wouldn't be very effective after being pickled in alcohol, immersed in hydrogen peroxide vapour and then dry cooked in hot nitrogen for a several days.
Despite the apparent hostile nature of the surface of Mars there are doubtless niches that bacteria, etc, could survive in (see the growing discoveries of extremophiles across Earth). Sagan reasoned that contamination of Mars by a single Earth originating microbe could lead to a micro-organism population on Mars comparable to that of Earth within a decade. It may well take longer than that but contamination is pretty much inevitable. How ironic if the only life we discover in the solar system in years to come turns out to be prior contamination from Earth. Then again, perhaps that's how life is kick started around the universe... We now go to great lengths to isolate return samples from the terrestrial environment to avoid contaminating either.
Also (in the case of space, the Moon) we've mentioned intense UV (I think) but a space suit also protects against micrometeoroid bombardment and can provided some shielding for internal organs against particles in the solar wind, eg helium nuclei.
Unfortunately the surface dust appears to be a super oxide. You really don't want to be kicking that up and getting it on your skin, let alone in the nice moist linings of your lungs (lunar dust is bad enough).
Additionally, a major problem with human missions to Mars is going to be forwards as well as backwards contamination. It's hard to see how we could meet the UN Outer Space Treaty/COSPAR planetary protection requirements; astronauts wouldn't be very effective after being pickled in alcohol, immersed in hydrogen peroxide vapour and then dry cooked in hot nitrogen for a several days.
Despite the apparent hostile nature of the surface of Mars there are doubtless niches that bacteria, etc, could survive in (see the growing discoveries of extremophiles across Earth). Sagan reasoned that contamination of Mars by a single Earth originating microbe could lead to a micro-organism population on Mars comparable to that of Earth within a decade. It may well take longer than that but contamination is pretty much inevitable. How ironic if the only life we discover in the solar system in years to come turns out to be prior contamination from Earth. Then again, perhaps that's how life is kick started around the universe... We now go to great lengths to isolate return samples from the terrestrial environment to avoid contaminating either.
Also (in the case of space, the Moon) we've mentioned intense UV (I think) but a space suit also protects against micrometeoroid bombardment and can provided some shielding for internal organs against particles in the solar wind, eg helium nuclei.
2hats
Dust.
There was one incidence of a shuttle astronaut's space suit getting punctured during an EVA by a small rod (part of the suit). Interestingly the hole sealed when the astronaut's blood coagulated with the bar at the site of the puncture. Astronaut didn't notice at the time, probably too preoccupied and excited with the space walk, only wondered about the painful red mark on his hand afterwards.
