I know space is a vacuum. However, if you were to be in space with a really tight seal around your body except for your hand, would that have any adverse effects on that part of your body?
In: Physics
I do recall reading somewhere that you can survive in space without a helmet (assuming the rest of you is in a protective suit) for around fifteen seconds. After that you pass out because you lose all the oxygen in your blood.
EDIT: Sorry, I realised I didn’t make it clear that shortly after you pass out you then die because your unprotected head is exposed to a freezing vacuum. You definitely die. I just thought it was intriguing that you could theoretically take off your helmet, snap a selfie, and then put your helmet back on. Although I can’t imagine it would do your skin any good. Plus, there’s no shielding from radiation.
An unprotected hand would last longer than fifteen seconds, but probably not that much longer.
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