their is tons of problems in zero gravity. The easiest way to think of "zero gravity" is that there is no such thing as "0". All you are doing is constantly falling. Now, thing of how you would feel if you fell off a cliff, and you NEVER reached the bottom....Theirs 0 gravity in a bottle. Of course if its an astronomer, we all know another major problem *cough*hubble*cough*. Our telescope lenses are ground on earth, taking in the effects of earths gravity. You take them to 0 gravity, they no longer have that pressure on them, and reform =p
If you really want to learn lots about z-g, go to this site,
http://astrobiology.arc.nasa.gov/new...ews.cfm?id=988
Of course, i have to include this typo that i just saw on that page...
"
Oct 04, 2002 | SCIENCE, MISSIONS, TECHNOLOGIES
Space Medicine
(NASA) - In order for astronauts to safely travel to Mars and other planets, new technologies must be developed to dope with the ill effects of space."
hehehe.... crazy Americans, always doping up their pilots...