How can a humanaties student go to space?

Can a humanities student(basically, it consists of Social studies, Law, psychology, and also Maths) become an astronaut or somehow travel/go to space, like to space stations and all.... Also, consider that if I have done *psychology with Bio* too, i.e. can I go to space and observe how the human body and emotions react in space and conduct such research? If yes, then how?