Hello, So I'm going to be a third year molecular and cell biology major soon and I'm barely catching up on the requirements to complete the major at my university. I really had a hard time choosing between this and physics, thinking and weighing out the differences between the two for a few months. I chose biology in the end since I was just better at conceptual understanding rather than that required of physics. I would switch now but I just wouldn't make it in time for graduation. Still, I can't really see myself being as passionate about biology as I am about space sciences. I don't mind the thought of studying astronomy in graduate school but thinking about pursuing a phd in a biological science just doesn't feel right to me. What I am wondering is how can I prepare myself for a graduate program in astronomy/astrophysics? My understanding is that graduate schools need some kind of record that I actually had training in advanced physics and laboratory.