Surviving in Space: The Fate of the Human Body

Without a spacesuit, a person would not survive for long in the harsh vacuum of outer space. Within 10 to 15 seconds, they would become unconscious due to a lack of oxygen. The oxygen in their bloodstream would be used up within a few seconds, causing brain death to follow within minutes. Spacesuits not only provide vital oxygen and pressurization but also protect astronauts from extreme temperatures, radiation, and micrometeoroids. Being in space without a spacesuit is extremely deadly and immediate rescue or resuscitation would be necessary for survival.