How to get into the Astrobiology field?

I am a college sopre and I am really fascinated by the search for life in the universe. It is a topic that really makes me pionate, but I don't know what I should be studying (majoring in) to have my career in this field. I'm not really a biology person, but it seems like there is more to the field than just biology. I am currently an astrophysics major, but I don't find galactic astronomy that interesting. I find topics like Mars, Europa and Enceladus much more fascinating because they are closing related to the search for life in the universe. What should I be studying so that I can have a future in this field? What are the different areas that make up astrobiology? Does anyone have any general advice on getting into the field?