2. I think we should have an excellent physical condition as the space is weighlessness, everything will be different if we don't have good health, we cannot conform to it

3.You may have to prove it by running marathon or going swimming and anything like that, things relating to do exercise

3.You can watch other planets and even our Earth from outer space, every bizarre phenomena also.

4. I don't know for sure, maybe it couldn't be count as it may depend on many factors

5. I may feel a bit boring and my head may feel like spinning as we just orbit around and around another circle lapse