Okay, I will try to tell a little bit more about biophysics and how I see it's application.
Good definition of biophysics give us Wikipedia:
"Biophysics or biological physics is an interdisciplinary science that applies the approaches and methods of physics to study biological systems. Biophysics covers all scales of biological organization, from molecular to organismic and populations. Biophysical research shares significant overlap with biochemistry, physical chemistry, nanotechnology, bioengineering, computational biology, biomechanics and systems biology."
In more simple words I can say that biophysics try to understand and explain how works living organisms. Describe various processes on different levels of organization. For example, from the macroscopic point of view, biophysics can give precise picture of human movement, show where is the center of the mass, what forces act on the whole body when we move. At the same time it also can explain what happens on microscopic level, how different molecules and proteins interact with each other, and how all that lead to the movement of whole organism.
So, knowing how our bodies works on Earth we can try to predict difficulties that we can encounter in another conditions, and propose different ways to fix that. Honestly, I think that humanity cannot travel through space without changing ourselves, our organism is adapted for Earth conditions and create space station, on which will be recreated Earth conditions much more difficult, compare to changing ourselves. We can "modify" ourselves genetically, replace some of body parts or organs by cybernetic or try to completely move our mind in to cybernetic body. This is the way, that will lead us to the stars.
For the next step I propose to chose a topic that you like, maybe we should organize something like poll, where anyone can propose theme for discussion?
P.S. Here I tried to briefly explain what is biophysics and my ideas about its general application. I don't know level of education of people who will read this, so I tried to avoid specific terminology this time. Sorry if I give a bad example, I tried to make it as simple as possible. And also forgive me if I make grammatical or other mistakes, english is not my native language.