Through intensive training. In fact, there is an old aircraft, a Comet, whose interior is cleared of seating and other stuff and its walls are cushioned. The aircraft climbs to a great height and then drops so that scientists inside are given a brief experience of weightlessness. You may be interested to know that this aircraft is known as the "vomit comet".
Yes.
yes
if you get sick nobody will take care of you
yes
Entering space may cause motion sickness and/or nausea. For obvious reasons it would not help astronauts if they got sick in space or when entering space
As long as they are getting as much natural lightas they want, and the area they are kept in is cool/well ventilated/clean/plenty of space, then no - they will not get sick.
because as with anyone, people get sick of people if they are around them all the time.
Because they can't hop in the car and go to the doctor's office if they get sick, and there is no ambulance in space if they are injured.
Men and women can become sick in space due to factors like microgravity, radiation exposure, isolation, and changes in the immune system. These factors can affect the body's ability to fight off illness and adapt to the space environment. NASA and other space agencies work on mitigation strategies to keep astronauts healthy during space missions.
That men aren't stronger than women!
because so they can get the use of how it feels when they are launched into space so they dont get sick or just like seasick
Space is presently being tested for in the US military branches and many people have been getting sick. Do some research online. It's gonna be illegal soon.