[stevieb (OP)]

Here an interesting theory of mine on how to basically to go back in time and see yourself as you were in the past:

Telescope today and the 'power' of magnitude would make Newton look on in wonder. But lets suppose in 300 years from now we invent a telescope in orbit to actually see rocks on say a planet next to Proxima Centauri (we'll pretend there is one for now). The light the telescope receives would be 4.2 light years old.
Now, lets also purpose at the same time we learnt how to create a wormhole and able to travel large distances in a second or two. We put the telescope in the wormhole and send it of to the planet next to Proxima Centauri. Once there the telescope would turn around and point at earth and pick up light that left earth 4.2 years ago. Zooming in you would start to pick up images of people, cars, streets etc as they happened 4.2 years ago. You instruct the telescope (already programmed as it would take 4.2 to instruct it to do something) to home in on a particular house and record all events for a day. The telescope then returns back to earth via the wormhole and play the recoding back. Hey! That’s me exiting my house 4.2 years ago and was on my way to get married...ah!!!  []

[Madidus_Scientia]

The problem is the size of the telescope you'd need. The best telescope we have now wouldn't make out a number plate on the surface of Earth, to see something with that resolution on a planet 4.2 light years away would need a telescope of astronomical proportions.

[Bored chemist]

Another problem is the idea that "lets also purpose at the same time we learnt how to create a wormhole and able to travel large distances in a second or two."
It would be a lot easier to keep a diary of what you were doing 4.2 years ago.