Back on Earth, Chris Hadfield ‘Tottering Around Like an Old Man' - Polidicks

i'm surprised that they have these problems after their exercise regime on the iss

I admire him and all he worked with so much

Yeah but there's no biological advantage in calcium loss and muscle weakening (among other things).

[QUOTE]“It’s very confusing for my body now"[/QUOTE] It was very confusing for his body when it first when up into orbit too. It just takes time to re-adjust. [editline]16th May 2013[/editline] I also really liked this video he did: [video=youtube;eGrzo4IvXyg]http://www.youtube.com/watch?v=eGrzo4IvXyg[/video]

[QUOTE=JgcxCub;40667740]Yeah but there's no biological advantage in calcium loss and muscle weakening (among other things).[/QUOTE] There is advantage actually, you don't want your body to overproduce bone and muscle in a situation that doesn't demand it, and that stuff doesn't last forever, keeping in mind we come from a process of natural selection where zero-g is a non-issue.

[QUOTE=RR_Raptor65;40669202]There is advantage actually, you don't want your body to overproduce bone and muscle in a situation that doesn't demand it, and that stuff doesn't last forever, keeping in mind we come from a process of natural selection where zero-g is a non-issue.[/QUOTE] Except we overproduce fat in a situation that doesn't demand it Seriously, current adaptation ability is severely overrated

[QUOTE=Used Car Salesman;40666085]Currently we only know of two ways to produce artificial gravity: centrifugal force, and constant acceleration. Gravity wouldn't be a problem if we had fusion engines that could accelerate at 1g halfway to the destination, flip over, and decelerate at 1g the rest of the way. But, since kick-and-coast is going to dominate our flight plans until that time, centrifuges are the only plausible way to go.[/QUOTE] If only there was a material like magnets that didn't mess with electronic stuff but still had the same properties, we could simply have suits and floors made of that stuff and the astronauts would be pulled towards it, it would have mostly the same effect as gravity on the body.

[QUOTE=Eltro102;40667676]i'm surprised that they have these problems after their exercise regime on the iss[/QUOTE] It's pretty difficult to get a decent, thorough workout on the ISS really. There's some exercise to keep muscle from completely disappearing, but not much to keep it strong.

ISS already has gravity. [img]https://upload.wikimedia.org/math/0/f/3/0f36df929ac9d711a8ba8c5658c3bfee.png[/img]

[QUOTE=Derp Y. Mail;40665925]The ISS [I]is [/I]in orbit, though. [editline]editlime[/editline] Pardon my confusion, I'm obviously no space expert - how is the ISS not in orbit? It's circulating the Earth, is it not? [editline]editlime[/editline] You know, you could just reply to this post and tell me HOW it's dumb instead of just rating it such and then leaving me to my confusion, because I really don't get what I said wrong. Just a theory. I can't learn anything if all you do is say "You're wrong!" and then don't explain why.[/QUOTE] Read what you replied to again, he said to send [b]everyone[/b] into orbit, so no-one would have to adjust to regular gravity ever again.

[QUOTE=matt000024;40669929]ISS already has gravity. [IMG]https://upload.wikimedia.org/math/0/f/3/0f36df929ac9d711a8ba8c5658c3bfee.png[/IMG][/QUOTE] They are inside the space station, and there is no net gravity on the inside. (Approximating the space station as a hollow sphere of course. :v:) [URL]http://en.wikipedia.org/wiki/Gauss's_law_for_gravity[/URL]

He even tweeted about mugs being spilt because he keeps forgetting that they no longer just float. Awesome guy.

-snip-

Screw gravity.

[QUOTE=DeanWinchester;40669796]If only there was a material like magnets that didn't mess with electronic stuff but still had the same properties, we could simply have suits and floors made of that stuff and the astronauts would be pulled towards it, it would have mostly the same effect as gravity on the body.[/QUOTE] It probably wouldn't because it's not the person being pulled to the "ground", it's the suit. They're still floating around inside the suit.

[QUOTE=theevilldeadII;40665951]I'm sure we can find a way some day[/QUOTE] I'm betting we crack the mystery of the higgs boson, if we can control it (and since it "causes" gravity (well, it's actually why some things have mass, but this is getting more technical)) we could potentially create artificial gravity.

[QUOTE=theevilldeadII;40665951]I'm sure we can find a way some day[/QUOTE] I'm pretty sure artificial gravity as we think of it won't ever really be possible, and I sure as hell hope it's not possible in a traditional sense, either. Imagine if there was a 'gravity source' on the ISS which exerted 1G of force on its surroundings - it'd tug the fucking Earth out of orbit. The only way I could see it working without fucking EVERYTHING up for EVERYBODY is if it operated on some weird principle, maybe like having a factor of 1/r^12 fall off of intensity (because then it could only really tug a large body if it was close to it, and at those distances it wouldn't even really matter anyway because you'd only be tugging it off course by a few metres - however that said, a 1/r^12 fall off of intensity would generate a fucking weird gravitational gradient across your body which would probably be less pleasant and healthy than weightlessness). Or maybe it could work if perhaps the artificial gravity could only exist in a sealed area between two panels or something (almost like a standing wave on a string). But even then, right now there's nothing that I'm aware of that would point to such a thing being possible, so it's all science-fiction speculation. Centrifugal force is gonna be the way to go.

[QUOTE=sltungle;40674671]I'm pretty sure artificial gravity as we think of it won't ever really be possible, and I sure as hell hope it's not possible in a traditional sense, either. Imagine if there was a 'gravity source' on the ISS which exerted 1G of force on its surroundings - it'd tug the fucking Earth out of orbit. The only way I could see it working without fucking EVERYTHING up for EVERYBODY is if it operated on some weird principle, maybe like having a factor of 1/r^12 fall off of intensity (because then it could only really tug a large body if it was close to it, and at those distances it wouldn't even really matter anyway because you'd only be tugging it off course by a few metres - however that said, a 1/r^12 fall off of intensity would generate a fucking weird gravitational gradient across your body which would probably be less pleasant and healthy than weightlessness). Or maybe it could work if perhaps the artificial gravity could only exist in a sealed area between two panels or something (almost like a standing wave on a string). But even then, right now there's nothing that I'm aware of that would point to such a thing being possible, so it's all science-fiction speculation. Centrifugal force is gonna be the way to go.[/QUOTE] It wouldn't affect earth noticeably enough to change its orbit by anything we can measure. Why do you think asteroids don't affect the orbit yet upon impact they exert way more than 1G.

[QUOTE=Legend286;40675558]It wouldn't affect earth noticeably enough to change its orbit by anything we can measure. Why do you think asteroids don't affect the orbit yet upon impact they exert way more than 1G.[/QUOTE] I don't think you understand what you're talking about as much as you think you do. Gravity on a large scale is a force that is exerted on all bodies within a very large radius around the source, and all bodies effected by it are effected by it with the same strength at the same radius. Having a 'gravity source' with a strength of 1G on the ISS a few hundred kilometres up would basically be the equivalent of sitting another Earth sized body several hundred kilometres away from Earth - everything would get fucked up. Well, in theory you could avoid the large radius of influence by using something like neutronium as the source of gravity, but then the gravitational gradient would be huge and probably deadly, so in order to get a gravitational field that's usable and not dangerous to people within it it'd probably have a HUGE effective radius that overlaps with Earth to a large degree which would quite quickly pull it off course (again, as though a second Earth was put right next to us). I can accelerate in a car at SEVERAL Gs but I don't all of a fucking sudden gain a massive gravitational pull. The convention of a 'G' in this context is just to relate to something everyday that's tangible, in this case the acceleration that one experiences under Earth's gravity at the surface (9.8 ms^-2). Gravity is something that applies over a very, very large volume of space and doesn't decay with time. The force departed into an object in a collision as a result of deceleration is something that happens over a very, very brief period of time and applies over a tiny volume of space, so on the large scale it doesn't really change much (like the orbit of a planet). [img]http://cdn.memegenerator.net/instances/400x/32871639.jpg[/img]

[URL="http://www.adrenalin.com.au/zero-g-zero-gravity-flight/usa/corporate/14565"]http://www.adrenalin.com.au/zero-g-zero-gravity-flight/usa/corporate/14565[/URL] Holy shit someone fly me to 'merica and buy me a ticket.

[QUOTE=Teddybeer;40667379]Except for the dizziness you get the first time, your body adapts really good to it, a bit to good. Its the trip back home where you need to adapt to not being in zero-g that is the problem. If you went to space for the second or third time there would be no problem adapting to it while returning still fucks you up badly.[/QUOTE] actually it fucks you up real bad in space too

I swear to god if someone calls [I]centripetal[/I] force [I]centrifugal[/I] one more god damn time I'm gonna fuck them up.

[QUOTE=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] Artificial gravity isn't even possible without making it like, heavier than shit

[QUOTE=Derp Y. Mail;40665925]The ISS [I]is [/I]in orbit, though. [editline]editlime[/editline] Pardon my confusion, I'm obviously no space expert - how is the ISS not in orbit? It's circulating the Earth, is it not? [editline]editlime[/editline] You know, you could just reply to this post and tell me HOW it's dumb instead of just rating it such and then leaving me to my confusion, because I really don't get what I said wrong. Just a theory. I can't learn anything if all you do is say "You're wrong!" and then don't explain why.[/QUOTE] u fucked up

Electromagnetic boots. A' la RIG.

[QUOTE=Mr._N;40670517]They are inside the space station, and there is no net gravity on the inside. (Approximating the space station as a hollow sphere of course. :v:) [URL]http://en.wikipedia.org/wiki/Gauss's_law_for_gravity[/URL][/QUOTE] The space station is a zero-[i]g[/i] environment but the gravitational pull of Earth is effectively the same for them as it is for us. It's zero-g not because of a lack of gravity but because they're in a freefall. Basically they're plummeting towards the Earth but because they're moving so fast they continually miss.

[QUOTE=JgcxCub;40681301]Electromagnetic boots. A' la RIG.[/QUOTE] That wouldn't fix the problem. Your body would still be weightless, and you'd still feel like shit upon returning to Earth.

[QUOTE=Mr._N;40670517]They are inside the space station, and there is no net gravity on the inside. (Approximating the space station as a hollow sphere of course. :v:) [URL]http://en.wikipedia.org/wiki/Gauss's_law_for_gravity[/URL][/QUOTE] the space station isn't made of gravitationally conducting material, though. if it was, we could construct an antigravity chamber out of similar materials on earth. zeke gave the correct explanation [editline]17th May 2013[/editline] building a faraday cage for gravity. hey, I have a new sci-fi concept for antigravity, cool. [IMG]http://upload.wikimedia.org/wikipedia/commons/f/f3/Faraday_cage.gif[/IMG] [editline]18th May 2013[/editline] [URL]http://physics.stackexchange.com/questions/19896/can-gravity-be-shielded-like-electromagnetism[/URL] apparently it's not just practically but also theoretically impossible, should have guessed e. OH, I see what you're getting at. never mind, didn't read the post you replied to.

[QUOTE=Chilean_Wolf;40677642]I swear to god if someone calls [I]centripetal[/I] force [I]centrifugal[/I] one more god damn time I'm gonna fuck them up.[/QUOTE] I swear to god if somebody overzealously states one more time that centrifugal force doesn't exist and fails to realise that using the word makes conversation in English a shit load easier by condensing an entire phrase such as, "the fictitious force that one feels as though is exerted on them as a result of circular motion," I'm gonna fuck them up.

[QUOTE=IPK;40677918]Artificial gravity isn't even possible without making it like, heavier than shit[/QUOTE] Something that feels like gravity could be done with a rocket and a giant, enclosed hamster wheel.