The mythology about the UN is absolutely breathtaking. People believe it costs a great deal of money to the United States. Completely untrue: it doesn't. The United States makes a net gain. People believe it's a world government, although the UN is a pathetically weak organization which improvises in emergencies to try to prevent the worst from happening.
If someday rockets should open the gates to space, then we must be oriented as to its environmental conditions and their possible biological effects. To study this, and to find means of protection, is one of the tasks of space medicine.