/sci/ - Science & Math

This thread seems to affirm what I've come to realize over the past few days:
That, despite what I've been assuming for these past couple years in community college, I don't actually want to be an aerospace engineer.. I've decided that a major in one of the sciences would suit me better.
I have no interest in working in an office for the success of some company. I always wanted to work for NASA (I know they're in the shitter right now) or something similar, I want to be on the front lines of real investigation and discovery.
What would you guys suggest as a major/career?
Chemistry? Physics? Geoscience? Astronomy/Astrophysics? Not even ruling out some form of biology..