Hello Everyone. This is my first post in Brilliant. I have a question about Hubble's Law. According to it, v = Hd. But if we take into account that we are looking into the past, I fall into the following confusion.
There are two galaxies A and B at distance of 5 and 10 billion years respectively. Now, when we observe A we are looking at how it was moving 5 billion years ago. The same applies for B. So, now we conclude that 5 billion years ago space was expanding at a slower rate while it was expanding comparatively faster 10 billion years ago. What's wrong with this conclusion?
It would be a great help if anyone could make it clear.