Microbiology or astrophysics?

So I have an internal debate going on between which of these two I should pursue as a future career. I'm enrolled for the Academy of Mathematics, Science, and Applied Technology magnet program at my high school, so it's not really like I can weed out one based on that. My family, while supportive, offer no real help, and I was wondering if anyone out there might know anything that could help me make the decision (yes, I still have time, and I have done research, but I would like to know where I want to go, and a bit of personal testimony never hurt anyone). It would also be helpful to know what courses would be required for each one, and things like that.