Thanks guys!! This is very encouraging.
Well, the old stars discussion. I'm pretty sure, this was meant ironically by you, Ulco
.
So it's always a decision. Should I have stars in my scene for artistic reasons with so many light around or not. This time I wanted it to look as real as possible. I haven' seen a NASA image yet (a real photograph - not long exposure images) showing bright lit parts of the ISS and the earth for example, where you can see stars. So, I didn't use any.
It's interesting, that even in most modern sci fi movies stars are visible in this kind of scenes, although if this was real, they wouldn't be. It just looks cool!