I was hoping someone could shed some light on a current predicament I'm having. Although I don't have the knowledge to make a real decision yet (only first year), I enjoy string theory, quantum mechanics (and quantum gravity), as well as cosmology. Based on these areas of interest, I'm unsure of which degree would be better to declare myself in, come third year: combined physics and mathematics, or combined physics and astronomy. Ultimately, I think I'd like to do theoretical work in one of those areas. Physics and mathematics will give me a great deal of mathematical knowledge, but will contain no astronomy courses, while physics and astronomy will give me a good amount of knowledge about the universe, but seriously lacks the mathematical experience. Would anyone here be able to chime in on what they think would be best? I think the math side of it would be best, because what I'd learn in mathematics courses are indispensable, especially in comparison to the astronomy courses, but I'd like others, more experienced, opinions.