If the space between earth and the sun started expanding and we moved away. Once it got 10 billion light years away, we would look at it and say that is what the sun looked like 10 billion years ago. How could we say that if we saw it 10 billion years ago? Sorry to use such an extreme example. I just don't understand, if other galaxies are moving away from us that are so-and-so miles away from us, how do we say what we are looking at happened so-and-so many years ago unless nothing is moving? If anyone could explain to me or point me to a site that explains why we view things in space the way we do, i'd be thankful.