UC Irvine Astrophysics

Hello, I am a transfer student and I recently got admitted to UCI as a physics major (my first choice was mechanical engineering) and I might have a chance to switch back into engineering, but if I can’t and get stuck with physics I was interested in the field of astrophysics.

I was looking at the courses and they seem to be energy based. My dream is to work for JPL or any other NASA organization, and I was wondering since the astrophysics classes in UCI are based on the study of energy are there any fields of engineering where I could apply this knowledge? I am very interested in propulsion and electric propulsion.

I could post the courses for this concentration for those willing to help. Thank you all for your time!