QuoteOriginally posted by: quantstartBarny, do you think the educational value is worthwhile? I'm interested because I primarily want to learn the material at that level. What other options do you think I should pursue if I want a grounding in astrophysics?No, you can learn all the relevant material in plenty of books. Cambridge try to make the outside world think that the course is insane, but it's not that bad, and the astrophysics modules are renowned as the "soft" options on part III anyway. I don't see that you have that many options - you chose your PhD, you can't do another one, move on with your life and give up the astro dream. Either that, or speak to a lecturer in the astro department and say you're willing to collaborate with them for free and explain your motivations and experience. Note, you don't have to only speak to people at Cambridge to do this.