I've been looking into grad programs for physics and astronomy. I have a Bachelor's of science in Mathematics, and I'm wondering how hard it would be to not only get into a graduate level physics/astronomy program (do well on the PGRE) but also how hard it would be for someone to succeed in the actual courses without a background in physics. I just find astronomy and physics fascinating, but doing well in a masters program feels a bit hopeless without any training in physics or research experience.
Has anyone else made this transition? Any words of advice?