Which college should i choose?

Ohio State or UC Boulder are both good choices for astronomy or physics. Keep in mind that there really aren't any jobs in astronomy if you don't have a PhD in the field, and if you're going to get a PhD in astronomy you should be majoring in physics. A double major or at least cles in math, astronomy, and computer science are useful/necessary, but physics is essential to get into grad school. And both of those are also good grad schools for astronomy (you don't stay in the same place for both the undergrad and grad degrees, but starting at one good school helps you get into another).