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Planetary requirements for human survival

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Tortun Nahme Minmatar Umbra Synergy Final Retribution Alliance	Posted - 2008.08.11 05:56:00 - [31] Now I am mortally offended Originally by: Cecil Montague They should change that warning on entering low sec to: "Go read Crime and Punishment for a few days then come back."
Surfin's PlunderBunny Minmatar Holy Church Of Garmonism	Posted - 2008.08.11 06:19:00 - [32] Originally by: Tortun Nahme not american? and you still use the imperial system you better have an awfully good excuse In the USMC we use the metric system, it makes a shitload more sense You're not afraid of the dark, are you?
Two Flower Caldari Allied Tactical Unit Scalar Federation	Posted - 2008.08.11 14:46:00 - [33] I think the supper boffin scientists do know what gravity is and how its caused ( mostly) I remember reading that it has somthing to do with any object that has enough mass actually causes and "indentation" in spacetime and objects roll towards it. Think of 4 people holding a big sheet of rubber or pvc in each of the 4 corners, now put a basket ball in the middle of it and roll some marbles in from the sides. that's basically how gravity works. That's a 2d analogy ofcause the 3d version is mind bobbling
Pwett Minmatar QUANT Corp. QUANT Hegemony	Posted - 2008.08.11 16:01:00 - [34] Originally by: Tortun Nahme not american? and you still use the imperial system you better have an awfully good excuse Because the metric system is for people who are bad at math! _______________ Pwett CEO, Founder, & Executor <Q> QUANT Hegemony
Mr Li The Graduates Morsus Mihi	Posted - 2008.08.11 18:13:00 - [35] Don't forget about a magnetic field - the only reason have an atmosphere. Of course this doesn't matter if there is already atmo detected, but if a young planet is found with geologic activity (thus emitting gas) it will need to be protected from stellar 'winds' and expulsion of material by a hearty magnetic field.
7shining7one7 Don Rico's Massive Rainbow Storage	Posted - 2008.08.11 18:30:00 - [36] Originally by: Mr Li Don't forget about a magnetic field - the only reason have an atmosphere. Of course this doesn't matter if there is already atmo detected, but if a young planet is found with geologic activity (thus emitting gas) it will need to be protected from stellar 'winds' and expulsion of material by a hearty magnetic field. allready mentioned but yes you're spot on
pwnedgato	Posted - 2008.08.11 18:33:00 - [37] Good liquor.
goodby4u Valor Inc.	Posted - 2008.08.11 19:00:00 - [38] Hot pockets, and lots of them tbh.
Wun Wei	Posted - 2008.08.11 21:38:00 - [39] So despite this lively discussion (which actually I had not anticipated) we still don't have any indication about how many gs or what the maximum or minimum atmospheric pressure a human can withstand for a prolonged period of time. I am sort of amazed I haven't been able to find anything on the internet, so maybe this is information that's not really available.
vanBuskirk Caldari	Posted - 2008.08.11 22:04:00 - [40] I've been doing a bit of googling. Atmospheric pressure in the Andes and on the Tibetan plateau is about 0.6 atm (600mb) and that's about the highest that people live for extended periods - and that's with genetic adaptation. The problem is not so much pressure as partial pressure of oxygen; people can live at altitudes up to maybe 40,000 feet, but only while breathing pure oxygen. At the other end, nitrogen narcosis sets in at about 3 bar of nitrogen. With a safety factor, an Earth-type atmosphere at 2 bar ought to be safe for extended periods; possibly an exotic atmosphere containing mostly neon with a small amount of oxygen might be survivable, but I don't see how such an atmosphere could exist in the first place. I agree with the OP's ideas about temperature, with the proviso that at the higher end the humidity has to be low. At the lower end, lower temperatures might be tolerable; but sustained below-freezing temperatures over most of a planet mean no food to eat! Gravity; no data at present, but somewhere between 0.5g and 2g ought to be sustainable. I suspect, however, that living in low-gee for extended periods might make it impossible to live at Earth gravity afterwards. It's also rather likely that extreme atmospheric conditions might make the temperatures that are tolerable a rather narrower band, and also vice versa; the body has to make adaptations that might be compromised if already under another sort of stress. Just my 0.02 isk. ---------------------------------------------- "Violence is the last refuge of the incompetent."
Tortun Nahme Minmatar Umbra Synergy Final Retribution Alliance	Posted - 2008.08.12 00:00:00 - [41] oh to address at least partially the gravity question, recent studies in astronaughts have shown the low g enviroment in free fall to have aided in the onset of osteo perosis (sp?) and other degenrative bone disorders, but im sure in time we could adapt humans can withstand a burst force of up to 12-15 g's (most notably during the launch of a rocket or shuttle) but not a sustainable field of that level, though a level of 3 g's has been sustained in supersonic flight for over 8 hours, so 2 g's is perfectly reasonable for long term exposure. Originally by: Cecil Montague They should change that warning on entering low sec to: "Go read Crime and Punishment for a few days then come back."
Surfin's PlunderBunny Minmatar Holy Church Of Garmonism	Posted - 2008.08.12 00:29:00 - [42] Originally by: Tortun Nahme humans can withstand a burst force of up to 12-15 g's Yeah, the weak ones You're not afraid of the dark, are you?
7shining7one7 Don Rico's Massive Rainbow Storage	Posted - 2008.08.12 00:45:00 - [43] Originally by: Surfin's PlunderBunny Originally by: Tortun Nahme humans can withstand a burst force of up to 12-15 g's Yeah, the weak ones ahaha.. "i'm a marine, i'll walk on water if i have to, semper fi!" surfin you're cute.
pwnedgato	Posted - 2008.08.12 00:49:00 - [44] Mind over matter and such. Some people spend lifetimes studying to do such feats. USMC personnel go through 14 weeks of basic and accomplish the same.
7shining7one7 Don Rico's Massive Rainbow Storage	Posted - 2008.08.12 00:56:00 - [45] Originally by: pwnedgato Mind over matter and such. Some people spend lifetimes studying to do such feats. USMC personnel go through 14 weeks of basic and accomplish the same.
Slade Trillgon Siorai Iontach	Posted - 2008.08.12 04:02:00 - [46] Edited by: Slade Trillgon on 12/08/2008 04:03:57 Originally by: Wun Wei So despite this lively discussion (which actually I had not anticipated) we still don't have any indication about how many gs or what the maximum or minimum atmospheric pressure a human can withstand for a prolonged period of time. I am sort of amazed I haven't been able to find anything on the internet, so maybe this is information that's not really available. How deep in the ocean can one go without succumbing to the pressure? Find that out and you have at least an answer to what type of external pressures the human body can withstand. I told you that without gravity, in like the 3rd post, that around the 6 month point 0 gravity starts having real bad effects on bone density. Slade DesuSigs
Surfin's PlunderBunny Minmatar Holy Church Of Garmonism	Posted - 2008.08.12 04:58:00 - [47] Originally by: Slade Trillgon Edited by: Slade Trillgon on 12/08/2008 04:03:57 Originally by: Wun Wei So despite this lively discussion (which actually I had not anticipated) we still don't have any indication about how many gs or what the maximum or minimum atmospheric pressure a human can withstand for a prolonged period of time. I am sort of amazed I haven't been able to find anything on the internet, so maybe this is information that's not really available. How deep in the ocean can one go without succumbing to the pressure? Find that out and you have at least an answer to what type of external pressures the human body can withstand. I told you that without gravity, in like the 3rd post, that around the 6 month point 0 gravity starts having real bad effects on bone density. Slade I think it's like 300 ft. max. And you have to use a mixed gas rig because oxygen becomes toxic at around 200 ft. You're not afraid of the dark, are you?

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