Hello BlesseNtumble,your add-on is fantastic,but I have some suggestions.

1.The sun in the sky on Mercury should be white,because Mercury has no atmosphere.
2.I think GS has a better rendering effect on the no-atmosphere-planet's sun in the sky than GC4,so if you can,change the sun from these planets' sky(for example,the moon,the asteroids and the earth-spacestation) to GS's rendering.

3.Add config option to disable the background-music in GS.

Can you accept my suggestions?Thanks!

Ok, I'll add a render of the sun to the Moon and Asterodes. So I'll change the render on Mercury and add the config.