Hi. I am currently a senior in highs chool and have already been accepted to a college [UMKC]. I was wondering if it would be beneficial for me to double major in Physics and Math. I am planning on going to grad school and getting a Ph.D in Astrophysics or theoretical physics. Would double majoring aid me in this process? Would it give me an advantage for gradschool? I know that i don't have to declare a major till Junior year in college but i am interested in what i should be planning for.