Post
by VictorBorun » Thu Dec 31, 2020 5:18 pm
Do I get it right?
1. Here on Earth we are biased. Let's take an observer in the middle of nowhere, in the center of a typical void. With a telescope, he'll get to see clusters of galaxies all around, say, 250 million ly away, or 100 times the distance of Andromeda galaxy. What mean spectrum that observer will see? Will it be like our Sun's, or will it be tainted with a color? What color that will be?
If we try to calculate the answer looking in our sky, we have to correct what we see. A distant galaxy looks smaller in proportion with the distance at the time of emitting the light, fainter and redder (z+1) times, and at a younger age of its evolution. After corrections, we can simulate a mean color of today.
2. Is it darker or lighter, we can not reason. It won't be a full blown color, it will be just hue plus saturation. We can place it near white, or near black, or near 50% gray, it does not matter. If near white, it's latte. If near black, it's raven black horse.