Panglossian

Ok, here's the dilemma: I'm currently a freshman at UF majoring in aerospace engineering, and lately I've been having second thoughts about my choice. See, I'm deeply fascinated by anything flight-related, specifically space flight, so my grand plan is to eventually get a PhD in astrodynamics and wind up doing research for gov't. (either US or international) or in private industry.

The thing is, I'm also interested in pure physics. Another side of me wants to go the physics major track and wind up with a PhD in high-energy/plasma physics, once again to engage in research for gov't. or private industry.

What I'm worried about with continuing the engineering track is being stuck doing mundane number-crunching or otherwise not use any of the knowledge I'd have picked up doing undergrad/grad. Maybe I just have a misguided notion of what engineers actually do, since I haven't been able to find out an accurate depiction of what engineers regularly do and how much of what they learn directly correlates with their duties.

Any advice is appreciated, since the physics track is significantly different from the engineering track, and double majoring is strictly out of the question.