Okay, so it isn't exactly traveling back in time but hear me out.
While looking at the moon last night with my eldest daughter, she made a comment about how far away it is etc. etc. That made me do some thinking on how we are using the Hubble Telescope to see objects very far away. Please note that I am not the first to point this out, my astronomy prof, other students and myself discussed this a bit. With uot further rambling please consider this:
1. When we look at stars, we are seeing light emited by that star sometime in the past.
2. The length of time it takes for the light to reach the earth is also the "distance" astronomers use. For example is a star is 3 light years away from earth, the light we see is three years old.
3. The Hubble can look farther away from earth than any other device thus far
4. Therefore the Hubble lets us see farther back in time than ever before
5. Theoretically, if we look farther and farther away, we should be able to see the Big Bang.
Chew on that for a while, some of the implications are mind numbing
ZRY