I am currently applying to PhD physics programs across the US and so far my letters of recommendation are from the following: 2 astrophysics professors who I have taken astrophysics classes from, and 1 professor with a physics PhD but taught an upper division scientific writing class to me. Since I'm applying to a physics program, are these references to heavy on the astrophysics side or is that close enough to physics for the admissions committees? A little about me: I'm a double major in pre professional physics and applied mathematics with a minor in astronomy. Thank you!!