long term effects of microgravity?
483439
Go to the fellowing site.\n\nhttp://exploration.nasa.gov/programs/station/PuFF_lite.html\nor\nclick below to get a download with more details www.space.edu/spacegrant/Totenhagenabstract.doc
905129
Gravity, makes your neck go baggy! It drags a lot of things earthbound, especially when you hit 50!
874868
Well, if you are going feet first, then there may be a difference of a few thousand g between your feet and your head, so we could guess one will be sucked in, in tiny slices being pulled off from your body due to the delta gs.\n\nThere was a nice graphic effect simulation of this effect in one of the "Space: Above and Beyond" episodes.  If I remember right the episode was "Ray Butts". Worth watching it.
102660
The effects of the thrust pushing against the shuttle itself.
719839
in the shuttle? absorbed and filtered. Their is still humidity but under control.\n\nIn the outer space there isn't any  just on rocks(asteroid)
806969
Hmmm change in gravity?\n\nYou need to send a free sample of hair dye to NASA so they can sent it out in space and test it for you.
138716
try this report from 1999 to see actual documented studies. http://www.rimbaud.freeserve.co.uk/dhap99f.html
524184
The effect of weightlessness is due to the fact that the astronaut is falling towards the Earth at the same rate the spacecraft is falling.  I use the term "falling" because the spacecraft, and astronaut are both being accelerated towards the earth.  The reason they remain in orbit is because they have momentum perpendicular to the Earth.  So, like a weight tied to a rope being swung in a circle, the weight is constantly being pulled towards the center of the circle, but never actually moves to the center.  Likewise, the astronaut is pulled towards the Earth, but does not fall into the earth.
571264
I don't know the exact number of pounds, but they lose a great deal of muscle mass fairly quickly- This aspect of space life is the greatest problem and the one they spend the most time trying to correct.  Over a longer period of time, they also lose bone density and develop edema.
478212
http://www.nasa.com\nsee this
692319
Lotsa problems : \n\nTime : it would take like 2 years to get there\n\nHuman body : after 1 month in space, the human body has troubles with its bones because gravity doesn't work anymore, imagine after two years\n\nSpace : sun radiations would be very dangerous\n\nHuman himself/herself : who will volunteer for such a task? Imagine been crammed with 6 other folks in a room no bigger than your average kitchen, they'd probably kill each others before reaching Mars...
90541
An interesting paper on the subject:\nhttp://www3.interscience.wiley.com/cgi-bin/abstract/108064559/ABSTRACT?CRETRY=1&SRETRY=0
911012
In all probability the child body would adapt to the weightless environment fine as the human body tends to adapt well, and is quite resilient. If, however, the child was to land back on earth, the child's body may experience physical trauma, as Astronauts who have experienced extended space flight have had to be rehabilitated when they return to earth. This is because their blood flow, and muscle mass changes to adapt to a weightless environment, and so it also has to adapt back to an environment with gravity.
1100560
Antigravity on earth at least = negative G’s.  you can achieve this by jumping a dirt bike or even your car (not recommended).  \n\nThere is even a flight called the Vomit Comet.  NASA operates a KC-135 craft outfitted to perform parabolic arcs that give weightlessness or more properly freefall lasting 20-25 seconds. The plane is nicknamed "The Vomit Comet" because of the large number of researchers that become ill. Imagine a roller coaster thousands of feet high. Imagine going up and down that roller coaster repeatedly for a coupole of hours. Now you know why so many people get sick!
478657
nothing.\n\nthere is no documented effect of this kind.
868933
NASA experiment a lot on this issue, maybe by login onto their site you'll find the info you're lookig for, luck..☺
1178549
Well, the second half of your question is easier to answer -- these problems haven't been solved yet, and they are of great concern to the folks at NASA and the ESA (yes, I know there are other nations and organizations working on space travel, but most of them are still working on getting into orbit for more than a few hours)  If you're talking about simply travelling to the moon or Mars and setting up a colony (one-way trip, in other words), then the G-forces you're worried about are only really experienced during launch, and to a lesser extent during the burn to slow down for re-entry.  Really, the problems that keep mission control specialists up at night are bone density loss from lack of resistance in microgravity (the latest data show that each month spent in near zero-G lowers bone density by 10%, meaning you'll be quasi-osteoporotic by the time you get to Mars and back), constant radiation exposure from the sun and cosmic radiation (not to mention if you get caught in a solar flare), and the usual food, water and air issues that you get on any extended voyage.  Oh yeah, and vitamins tend to break down faster in an oxygenated, low-gravity environment, so any supplements brought along to fight bone loss as well as many medications to treat illness along the way simply won't work after a couple of weeks.  Big issues, no clear answers just yet.