Why must astronauts wear pressurized suits in space.?

Answer 1

Four reasons:

1. Pressure. There are about 14.7 pounds per square inch of air pressing down on you. In space, it's about 1.5x10^-10 pounds per square inch. With that little pressure, you have about 10 seconds before losing consciousness without protection. No, your blood won't boil, and your head won't explode, but your saliva will instantly freeze, and if you don't exhale immediately, your lungs could burst.

2. Temperature. Space has an ambient temperature of about -270 degrees Celsius. Needless to say, this will kill you fairly quickly without protection.

3. Radiation. The radiation isn't quite as big a threat as some say, but if you're outside for 6 hours at a time, it is a threat.

4. Micrometeoroids. It hasn't happened yet, but assuming continued human presence in space, someone will eventually get hit by a piece of debris in orbit.

Note that there are the "space suits" that are used during spacewalks, and there are "pressure suits", which are used during risky maneuvers when the spacecraft's cabin might be breached. The difference is that space suits protect against all four major threats; pressure suits only protect against pressure, assuming that the spacecraft cabin will protect against heat loss, radiation, and orbital debris.

Answer 2

Space has no air pressure. You body has build-in pressure. Did you see the mento diet coke video, what happen when the cap losen ? When the body of the astronaut exposed to no pressure environment, All the pressure inside the body will get out. You would not look the same ever, ever again.

Answer 3

Astronauts are human beings used to the atmospher of the earth . they are undr the pressure of of the air column from the surface of the earth to the upper most end of the air blanket over the earth .that comes to about 32 pounds per suarwe inch. so our body is used and conditoned to live under the pressue of the atmospheric air . that is the blood pressure and our our blood vessels and all internal organs are used to that pressure .that is they are at equillibriu withthe external pressure of the atmospher . the pressure of of out blood against the wall sof our blood vessels would also be equivalent to 32 pounds per sqyuare inch that is why their gflow in our system is normal and they freely circulate throughout our body withot bursting out our blood vessels . Inthe space ther is no air our air pressure . the air blanke=t is held close to the earth by the gravity of the earth and the very pressure is due to the weight of this air column that it aquires due to the forcrs of gravity only . In the abscence of gravity in space , if ur body is not protected by creating a conditioin to which it was used in the atmospher of th eearth ,. the pressure of the blood vessels would burst he blood vessels as the out side will be zero while pressure inside the body would be 32 pounds per square inch .The blood vesels would expand and burst out and man will die . o the body is to be protected by maintaining the pressure and temperature also the same as on earth .In the space the temperature would fll down to -237 degree centigrade .man will not survive in that temperature also .

Answer 4

Without them the vacuum of space would cause their bodies to explode as the air and fluids pushed against the skin which would already be brittle in the sub-sub-zero cold.

Answer 5

Because without air, you would die.