I"m fond of astronomy myself, that’s why i raised this point. 
Yes, that is really cool to have a realistic sky. I agree with above comments about some kind of distorsion.
After looking in deep again, it’s not that obvious tho… in northern hemisphere, taurus constellation looks only a view angle of a few degrees, in real life its at least 5-8 degrees.
What we have is fine, but i was just wondering…