What would happen if an astronaut were to take off their suit on the moon?

Question

Obviously the astronaut would need a source of air on the moon but what would happen to their body aside from the moon getting very, very cold or very, very hot from the lack of atmosphere.

Answer 1

Your lungs would not explode, nor would your blood boil.

Based on research done at NASA's Glenn Research Center, the effects of explosive decompression on a human would be about 9-11 seconds of consciousness, followed by paralysis, generalized convulsions, then paralysis once again. Then water vapor will form rapidly in the soft tissues and somewhat less rapidly in the venous blood causing marked swelling of the body up to twice its normal volume (unless it is restrained by a pressure suit). Heart rate will fall rapidly. Arterial blood pressure will also fall over a period of 30 to 60 seconds. Venous pressure will rise due to distention of the venous system by gas and vapor. Venous pressure will meet or exceed arterial pressure within one minute. There will be virtually no effective circulation of blood. After an initial rush of gas from the lungs during decompression, gas and water vapor will continue to flow outward through the airways. This continual evaporation of water will cool the mouth and nose to near-freezing temperatures; the remainder of the body will also become cooled, but more slowly.

Answer 2

The astronaut would have a horrible dead, blood and other floyds inside his or her body would start inmediately to boil and escape violently to the moon atmosphere until the body get completely dry, even the eyes and the slungs would explode. After that his or her remains would get very cold in the dark side of the moon and would get very hot in the part of the moon lighted by the Sun.

Answer 3

Well suppose you had the misfortune of being shoved out of an airlock naked. Apart from the dying part you would get very sun-burnt due to the lack of atmosphere. You would have a bad day.

Answer 4

His/her lungs might explode if they tried to hold their breath. They'd be very cold, and have a viable remaining lifetime of about 30 seconds. If they were rescued within 30 seconds to 1 minute, they might be ok; suffering possible side effects such as the bends.

Answer 5

If he can doff it and don it in less than 10 seconds, he'll be OK. Exposure to full vacuum of 20 seconds is pushing it (he will at a high risk of blacking out) and at 1 minute? ... he is probably toast, suffocation, blood boiling, the bends, all that nasty and very painful stuff.

Answer 6

Lack of atmospheric pressure would cause the lungs to explode.

Answer 7

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