2007-04-27 18:09:14 · 3 answers · asked by Chef Dane 2 in Science & Mathematics ➔ Astronomy & Space
Down on the surface of Earth and on up to about 60-75 miles altitude where Space begins, our planet's atmosphere is 20 percent oxygen and 80 percent nitrogen.
On the way up, at around four miles altitude, the atmosphere is half as dense as it is on the ground.
At eight miles above the surface of Earth, the air is so thin and the amount of oxygen so small you must wear a pressurized oxygen mask.
Above twelve miles altitude, the total air pressure is no longer sufficient to keep body fluids from boiling. So, humans must wear spacesuits that not only supply oxygen for breathing, but also maintain a pressure around the body to keep body fluids liquid.
2007-04-27 18:10:09 · answer #1 · answered by spaceprt 5 · 0⤊ 0⤋
Because trying to breathe in a vacuum really sucks.
2007-04-28 01:13:45 · answer #2 · answered by charley128 5 · 0⤊ 0⤋
CANT TOUCH THAT
2007-04-28 01:12:04 · answer #3 · answered by chilly 3 · 0⤊ 0⤋