I don't know how to put my question into words so I'll give a brief example of what I want to say. The andromeda galaxy is a spiral galaxy 2.5 million lightyears from earth. When we observe it, we see it nearly on its plane. Light travels at a finite speed, so we see the andromeda galaxy as it was 2.5 million years ago. Right. Now here's the weird part. Since it is approximately 220,000 lightyears in diameter, when we look at it, we must see it's closer side as it was say 2.5 million years ago, but it's far side as it was 2.72 million years ago. This number is even more exaggerated for a supergiant galaxy like M87, which has a diameter of a little under 1 million lightyears. This all must mean than when we observe a galaxy, not only do we see it in the past, but we also see it in an a shape it was never really in. We see a combination of it in different times. Am I right? And if so, do astronomers correct pictures to know what the whole galaxy looks like FOR REAL at a given moment? Thanks!