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

[IMG]http://beta.images.theglobeandmail.com/642/news/national/article11907024.ece/ALTERNATES/w620/MOS16_SPACE_STATION.JPG[/IMG] [QUOTE]He now feels like an old man, his arteries stiffer, his bones more porous and his body so weak he’s forced to sit down when he showers. After nearly five months in orbit, Chris Hadfield is re-adapting to gravity, getting used to the weight of his tongue in his mouth, being poked and prodded in a series of medical tests, having his blood drawn and his body taped with sensors. “It’s very confusing for my body now. My body was quite happy in space without gravity,” Mr. Hadfield said in a news conference broadcast from Johnson Space Center in Houston. [/QUOTE] [URL]http://www.theglobeandmail.com/news/national/back-on-earth-chris-hadfield-tottering-around-like-an-old-man/article11962098/[/URL] Recommend reading the entire article. A true hero.

Artificial gravity would be nice to prevent this

I wish him a speedy recovery. I can't imagine what it'd be like to go weightless for five months and then suddenly having to carry pounds again.

[QUOTE=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] nah, just send everyone into orbit so its micro-gravity all the time

[QUOTE=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] But you can do so much more without gravity.

[QUOTE=Eltro102;40665899]nah, just send everyone into orbit so its micro-gravity all the time[/QUOTE] 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=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] how hard would it be to put Artificial Gravity on the ISS.? and how much would it cost

[QUOTE=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] a station with centrifugal generated gravity (aka "a giant spinning wheel") would be super hard to put together. Maybe if Nasa had a budget bigger than a sack of potatoes for once, we could accomplish some crazy stuff [QUOTE=theevilldeadII;40665930]how hard would it be to put AG on the ISS.?[/QUOTE] you can't just 'make' gravity

[QUOTE=Wave160;40665919]But you can do so much more without gravity.[/QUOTE] have an on/off switch

Hadfield after the mic is turned off: "This is bullshit! Fuck you, gravity!"

[QUOTE=daijitsu;40665933] you can't just 'make' gravity[/QUOTE] I'm sure we can find a way some day

-snop-

[QUOTE=daijitsu;40665933]a station with centrifugal generated gravity (aka "a giant spinning wheel" would be super hard to put together. Maybe if Nasa had a budget bigger than a sack of potatoes for once, we could accomplish some crazy stuff [/QUOTE] A spinning module that attaches to the ISS would probably be harder to develop than an entirely new station that is built in orbit, then spun with thrusters. The issue with building a module that spins is you have to keep the torque from spinning the rest of the station in the opposite direction, like a helicopter with no tail rotor. One way to do it is to have a counterrotating flywheel that will create equal torque in the opposite direction and cancel everything out, or have two centrifuge modules spinning in opposite directions. Also, depending on how big it is and how fast it spins, you have to worry about keeping your wheel balanced. A smaller wheel will vibrate if, say, three or four people are gathered in one place and throw it out of balance. Finally, the centrifuge has to be pretty big to generate decent gravity without Coriolis forces screwing with the crew. In a small, fast-moving centrifuge, your head feels lighter than your feet and Coriolis is constantly nudging you sideways, making you walk crooked and feel nauseous. NASA had a centrifuge module planned, but it got canceled. It wasn't big enough to provide gravity for the crew, but it would have allowed for some real-world testing of the centrifugal artificial gravity concept.

[QUOTE=theevilldeadII;40665951]I'm sure we can find a way some day[/QUOTE] yeah lets just pray the laws of physics away [editline]16th May 2013[/editline] [QUOTE=Used Car Salesman;40665999]A spinning module that attaches to the ISS would probably be harder to develop than an entirely new station that is built in orbit, then spun with thrusters. The issue with building a module that spins is you have to keep the torque from spinning the rest of the station in the opposite direction, like a helicopter with no tail rotor. One way to do it is to have a counterrotating flywheel that will create equal torque in the opposite direction and cancel everything out, or have two centrifuge modules spinning in opposite directions. Also, depending on how big it is and how fast it spins, you have to worry about keeping your wheel balanced. A smaller wheel will vibrate if, say, three or four people are gathered in one place and throw it out of balance. Finally, the centrifuge has to be pretty big to generate decent gravity without Coriolis forces screwing with the crew. In a small, fast-moving centrifuge, your head feels lighter than your feet and Coriolis is constantly nudging you sideways, making you walk crooked and feel nauseous. NASA had a centrifuge module planned, but it got canceled. It wasn't big enough to provide gravity for the crew, but it would have allowed for some real-world testing of the centrifugal artificial gravity concept.[/QUOTE] also, the ISS is in a very low orbit and this would probably fuck it up even more

[QUOTE=theevilldeadII;40665930]how hard would it be to put Artificial Gravity on the ISS.? and how much would it cost[/QUOTE] They could put a rotating section on the ISS that produces centripetal force, simulating gravity, but, at present, we can't make gravity

[QUOTE=download;40666058]They could put a rotating section on the ISS that produces centripetal force, simulating gravity, but, at present, we can't make gravity[/QUOTE] 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=Wave160;40665919]But you can do so much more without gravity.[/QUOTE] Yeah but it's really not that great for your body. The human body is really not designed to function over long periods of time without gravity.

[video=youtube;KaOC9danxNo]http://www.youtube.com/watch?v=KaOC9danxNo[/video] Thread music.

[QUOTE=DeEz;40665744]Artificial gravity would be nice to prevent this[/QUOTE] Naw man, let's just do the opposite and get rid of gravity on Earth. I wanna float through my house!

[QUOTE=daijitsu;40665933] you can't just 'make' gravity[/QUOTE] Um Did you not see the space epsiode of family matters

I want to clear up some physics here. In low earth orbit, there is no lack of gravity; the force of gravity in LEO is still about 92% of that on Earth. But the reason that gravity doesn't affect a body in orbit is that orbiting causes an opposing force: centrifugal acceleration. To maintain a stable orbit, you have to be travelling at a certain velocity; if that velocity decreases, then gravity will gradually pull the orbit closer to Earth.

Well.. technically.. even in the ISS, they are still experiencing around 90% the gravity we feel on earth. They are falling, with Zero-G. If you built a tower to the height of the ISS, you could walk around on top quite easily, because there still is quite a heavy bit of gravity. This video says it better than i could though [url]http://www.youtube.com/watch?v=jTL_sJycQAA[/url]

[QUOTE=_Maverick_;40667018]Well.. technically.. even in the ISS, they are still experiencing around 90% the gravity we feel on earth. They are falling, with Zero-G. If you built a tower to the height of the ISS, you could walk around on top quite easily, because there still is quite a heavy bit of gravity. This video says it better than i could though [url]http://www.youtube.com/watch?v=jTL_sJycQAA[/url][/QUOTE] Very informational video anyway. Also what happens to a person while in space for too long.

[QUOTE=Teddybeer;40667238]Well the radiation that is probably not good for you, and you get bones that you can snap like twigs. Many of your muscle will be gone, and you get very sensitive feet.[/QUOTE] also your face puffs the fuck out like a balloon, which is why Chris' head looks smaller now that he's back on Earth

I think it's really stupid that human bodies are so bad at adapting to zero-g.

[QUOTE=JgcxCub;40667326]I think it's really stupid that human bodies are so bad at adapting to zero-g.[/QUOTE] How is it stupid?

Makes sense; 5 months of your body being adapted to weightlessness certainly wears on your physical attributes.

[QUOTE=JgcxCub;40667326]I think it's really stupid that human bodies are so bad at adapting to zero-g.[/QUOTE] No, the human body adapts really well. it's just adapting BACK under a LOT more stress that we have trouble with

[QUOTE=JgcxCub;40667326]I think it's really stupid that human bodies are so bad at adapting to zero-g.[/QUOTE]Actually we're just having trouble adjusting to gravity again :v:

Looks like his body didn't realize the gravity of the situation of being back on Earth.