Hello, all. I'm new to the forums but thought this might be the venue to ask a question I am pondering. I'm looking into the possibilities of returning to academics and pursuing a PhD in physics with an emphasis in astronomy and cosmology or possibly theoretical physics (haven't narrowed that one down much). I'm wondering, however, the feasibility of the course of action given my background and goals. Any advice folks out there have for me, please pipe up. A little about me: My undergrad is in Aerospace Engineering, and I have learned that I'm not terribly interested in that level of practicality; I believe my desires lie more in the realm of theory. I have a Masters of Arts in Administrative Leadership (think leadership theory and organizational behavior). I completed my undergrad in 2006 and have since been an officer in the US Air Force. I am a pilot in said organization, first as a mobility pilot (KC-10 air refuelers) and currently as a combat pilot (MQ-9 remotely piloted aircraft). While this is clearly a practical and operational application of both my undergrad and Master's degrees, I will mostly likely be leaving the Air Force upon the completion of my commitment in a few years. I've done some research into the prerequisites required for most traditional physics PhD programs, and am becoming slightly intimidated that I will have to start from scratch on this path. My desire would be to transition directly into a physics PhD program. Would that even be a possibility? I'm also afraid that my experience would not bring anything to the table, so to speak, and would feel like wasted time. I'm sure I'll have more questions, but if anyone knowledgeable has advice for me, I would be grateful.