The deeper we look into space, the deeper we are looking back in time! Light travels an amazing 670 million miles per hour. Yet the depths of visible space are so vast that we can see light arriving at earth now that left it's source 13.8 billion years ago, near the beginning of time (red shifted as it may be). All the light arriving from in between there and here is a history of the universe, waiting for us to read. We may not be able to change the past, but we can look deep into it's history.
