Question: how long can a person last on the moon without the proper space suit

Reka Nagy answered on 8 Nov 2016:

About 15 seconds – a person would quickly pass out due to a lack of oxygen! You could try to hold your breath, but this wouldn’t work as there is no pressure in space, because it is a near-perfect vacuum – this would actually cause you to die faster, because vacuum would cause the oxygen in your lungs to expand, which would shred your lungs, force the oxygen into your blood vessels and quickly damage your other organs as well. Not a pretty sight.