Question

Which is the biggest challenge in space travel?

Answer 1

I think 2 really big challenges are


First is the physical and mental health problems. ..

Being in zero gravity has detrimental effects of the body....


is hope it helps you

Answer 2

According to me the biggest challenge in space travel is to tackle time... oxygen food health and medication can be taken care of .. but the main challenge is to travel more distance in shorter time..
Hope it satisfies u :)