It was one of the most amazing evidences of the theory of relativity
I think you can find it in any text talking about this theory

of course you are aware of the red shift due to the doppler effect
The lines are shifted towards the red because of speed
Well if the speed is much higher than you must take into account also the relativity

I dont really know what you mean for interpretation

If you mean a sort of scientific prejudice the answer is , in my opinion, negative
Scientists took into consideration that unknown elements may exist but all the evidences are against this hyphotesis

If you mean that also the "observer "is an integral part of the measuring, in other words if you mean that there is not one only interpretation of the universe regardless of the observer
Well ,I dont really know
I know that this is one of the interpretation of quantum physics
In my opinion it is false but it is just a gut feeling