The limitation on our technology is such that we cannot provide the necessary shielding to protect from the radiation of the Sun when they are outside the Earth's shield. That and the gravity difference take their toll on a human body. Sometimes quickly. Sometimes deadly.
Nonsense. Man can’t breath above a certain altitude
or underwater too but that didn’t stop us from going
there.
This is good news to me, set a goal, excel, and find
a way. Improvise, adapt, overcome!
Global warming meh.