Blender Relativistic Sky Shader V2 

For some reason I spent like all of yesterday working on this, it now has a bit of redshift around the edges and in the retrograde direction, the sky in the retrograde direction actually widens too, and I managed to streamline the node tree quite a lot.
This is without the stylisation I was using previously, as the shader works just fine with or without it enabled. It also works fine in both Cycles and Eevee, though I rendered this in Eevee. Made in Blender 3.6.2.
Here's an Imgur album with the node tree and some pretty renders in it: imgur.com/a/2F... Feel free to use this shader in your own projects if you want.