This is astonishingly well done! I admit I know very little about stars, but I love all the detail and research you put into this! And it felt very real too. I could really feel the frustration and aches Aziraphale had from walking through all that cold and mud. The pull between just desperately wanting to be somewhere warm and desperately wanting to stay with Crowley and watch him open up. The romance was so sweet too. I certainly love a lot of stories where they have big, loudly proclaimed love confessions, but honestly I think this sort of scenario is a lot more likely: a self-conscious romantic gesture and kissing that, in the end, neither of them feel the need to explicitly explain. These idiots know they're in love. While it certainly means something to act on it, they're far past having anything to prove.

Also your footnotes are very funny! It was a nice extra element to have. Thank you so much for all the effort you put into this fic!