Please forgive my lack of knowledge about the more complex ways that we have determined that the rate at which the universe is expanding is increasing, but one thing puzzles me. I have read that based on measurements of the red shift of light we have concluded that the farther we look out into space we see that objects are moving away from us faster and faster. The farther we look the faster it is moving. We have determined based on these measurements that the rate at which the universe is expanding is increasing. Why? The farther we look out the farther back in time we are seeing. If we know we are looking back in time as we make these observations it seems like the only thing that we could conclude is that these objects move at the rate they did literally billions of years ago. If the farther back in time we look we see that these objects are moving faster then why do we not say that these very distant objects moved away from us at a much faster rate in the very distant past? How do we know what these objects billions of light years away are doing at the present time at all?