Physics vs physcs with astronomy. I'm currently applying to College. I know I'm intersted in science. If it wasn't for this book about planets I had when I was 5 I'd prob nvr liked science. So my question is should I major in physics or a physics with an astronomy emphasis? What exactly is the difference between an astronomer and astrophysicist? I feel that just physics is mainly what I want to do but I still have a interest in astronomy. How do I choose which is best for me?