<p>Whats the difference, what do you suggest for a person who wants to become a theoretical astrophysicist (PhD)?</p>
<p>Physics with an astrophysics specialization. I should ask…if you are more in to planetary sciences, you might need geology with the planetary emphasis. Which do you want to work on more…how the everything moves out there and interacts with each other? Or the make up of individual planets and such?</p>