If you TRULY wish to have a better understanding of how the Hubble can possibly see back billions of years in time, just check the current research on time and space as was well as dark matter, dark energy, gravity, physics, quantum physics, theoretical physics, astrophysics, applied physics, etc. You will see how certain scenarios make it plausible that one can "look back over distance in time".
You will have to make the effort as it will not be possible to explain it here. NOVA has had some good programs related to these subjects recently. You may still find the information and videos on the PBS site. It's a good place to start. There is also a plethora of information on the Internet.
My suggestion is stay with recognized and accredited sources of information, and not religious or ID related sources. That way you'll get the true picture of what the "other side" is saying so you can better understand their point of view. That is, if you want to form an objective opinion about it all....
Keep Up with TechRepublic