I have a Physic 201 understanding of physic. I understand that the most distant star (galaxy) that we can see from the earth is 4.4 billion light years (the time of the big bang) away. I think this is called the viewing horizon. Assume a person on a planet 4.4 billion light years from earth (let us call it B1) looks back at earth. I expect he will see the earth. What does he see if he looks in the opposite direction from earth? I expect he will see B2 – 4.4 billion light years away. How far is B2 from the earth???? – 8.8 Billion light years ??? This analogy could go on for B3, B4, B5 ….. Could this account for dark matter????