不是因為"瞬間"失壓，所以是凍死
正常而言人體急速失壓丟到外太空的話
樓上說像撕裂地平線電影情節那種情形會更快
體液沸騰同時造成體內壓力過大 七孔流血 甚至脫肛 都會發生
同時間 要看是不是暴露在陽光下 在陽光下溫度會更高將加速上述過程
失溫是要在背光的情形下才會發生，如果腳在陰影上半身在陽光下的話，
就會看到上半身瞬間爆裂(不至粉碎)然後下半身凍結。原因上面網友有提及
無空氣熱量僅以輻射方式傳導
至於人體意識應該不到一分鐘就消失了。應該不會太痛苦
謝謝某些網友提供一些 NASA 的資料給我，
我仔細了看了一下，
引述他們幾句話：
The theory predicts -- and animal experiments confirm -- that otherwise, exposure to vacuum causes no immediate injury. You do not explode. Your blood does not boil. You do not freeze. You do not instantly lose consciousness.
You do not explode and your blood does not boil because of the containing effect of your skin and circulatory system. You do not instantly freeze because, although the space environment is typically very cold, heat does not transfer away from a body quickly. Loss of consciousness occurs only after the body has depleted the supply of oxygen in the blood. If your skin is exposed to direct sunlight without any protection from its intense ultraviolet radiation, you can get a very bad sunburn.
所以根據他們的實驗結果和理論，
似乎就是在死掉前會先失去意識(廢話)，
是因為血液無法交換氧氣，
結果會先缺氧而死，
比凍死、體內液體氣化、自爆還要快，
目前這是我所看到的資訊。
At NASA's Manned Spacecraft Center (now renamed Johnson Space Center) we had a test subject accidentally exposed to a near vacuum (less than 1 psi) in an incident involving a leaking space suit in a vacuum chamber back in '65. He remained conscious for about 14 seconds, which is about the time it takes for O2 deprived blood to go from the lungs to the brain. The suit probably did not reach a hard vacuum, and we began repressurizing the chamber within 15 seconds. The subject regained consciousness at around 15,000 feet equivalent altitude. The subject later reported that he could feel and hear the air leaking out, and his last conscious memory was of the water on his tongue beginning to boil.
Aviation Week and Space Technology (02/13/95) printed a letter by Leonard Gordon which reported another vacuum-packed anecdote:
"The experiment of exposing an unpressurized hand to near vacuum for a significant time while the pilot went about his business occurred in real life on Aug. 16, 1960. Joe Kittinger, during his ascent to 102,800 ft (19.5 miles) in an open gondola, lost pressurization of his right hand. He decided to continue the mission, and the hand became painful and useless as you would expect. However, once back to lower altitudes following his record-breaking parachute jump, the hand returned to normal."
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