I was wondering if someone could help me out here... there are two career paths I'd be interested in following. One is aerospace engineering. The other is theoretical physics. I love the physics of fluid dynamics, orbital trajectories, etc. but I also love things like relativity, quantum mechanics, string theory, etc. I know that by definition engineering and theorizing are polar opposites, but I was wondering if anyone new of any sort of career that sort of combines the two. Is there any such thing as a physicist who studies the nature of the Universe and then uses this information to engineer new space technologies or experiments to test the theories?