It goes without saying that becoming (and being) an astronaut is no picnic. But that doesn't mean folks should be scared of applying. The bare minimum requirement isn't too rough: You need to have a bachelor's degree in science, math, engineering, or some other technology field -- and on top of that, you need either three years of related career experience or 1,000 hours of time logged piloting a jet aircraft.
So hey, nerds: Apply! Nothing is stopping you. If you're considered highly qualified -- which likely requires at least one advanced degree or a lot of piloting experience -- you'll be brought in for an extensive interview, examination, and physical testing process.
But a 0.1 percent chance is better than a 0 percent chance, which is what your odds of becoming an astronaut are if you just sit around moping.