Hi guys. I have a question regarding the expansion of space. Alright, so I know that space expands proportionally to the amount of distance. However, I'm not sure why this occurs. Can someone inform me on that? Additionally, I know any individual placed anywhere in the universe would observe galaxies closer to them moving at slower speeds than galaxies that are farther away. However I don't see how this is possible. I'll elaborate on that. Let's say that there are two groups of observers. One observer group is closer to galaxy A than the other group and they say that galaxy A has moved 50 light years away from galaxy B in the past 1 million years. The other group, being stationed farther away from galaxy A, communicates that they observe galaxy A has moved 70 light years away from galaxy B in the past 1 million years. How far has galaxy A really moved from galaxy B? Thanks!