Hydrogen Sky rising over Boston

Looking almost due east, so I can use the hi-res GALFA images for this. There's an annoying white spot that doesn't move for some reason, but since this is the third time I've rendered this I've stopped caring.

I used a similar animation of Prague for my first public talk ("Why the night sky is really boring and how to fix it") on Friday, it seemed to go down well. I plan to do a few more of these for selected international locations.