I've had this dream for a while and would like to know if it makes any sense.

Theoretically speaking, assuming one could use worm holes or some other teleporting method and with a powerful enough telescope 'teleported' far away, would it be possible to look back at Earth and witness its past? I'm talking about looking back at the dawn of humanity, and other significant events in our history.

I mean, does the light reflected from Earth reach that far out?

Yes,if you could "jump" to a different part of space and look back on the earth with a telescope with extraordinary capabilities you would see the light given off 1000 or 10000000 years ago. It would only depend how far you jump... :m:

Great, well if that's the case then I'm sure the guys at Google can pull it off sooner or later. They can do anything! :D

Looking forward to see snapshots of our past in a future version of Google Earth. And here's hoping that in days like the battle of Troy the weather was good :p

But on a serious note, I know it's impossible to achieve it in practice today or even in a distant future. But just knowing that in theory it could be done is a comforting thought. Our history is not lost yet! :)

The Earth rotates. From some place far out, you only see one hemisphere at at time. The Earth's orbital motion is 67,000 Miles (107,000 km) per hour. Galactic rotation imparts an even larger velocity to the solar system, and our local group of galaxies is moving at high speed toward some Great Attractor.

Furthermore, cloud cover obscures parts of the Earth, and our atmosphere distorts light rays a bit even when there are no clouds.

The sun, the Ort cloud, the Kuiper belt will sometimes interfere with visibility for an observer far from the Earth.

From thousands or millions of light years away, you cannot see details, and no sounds travel beyond our atmosphere.

Considering all of the above, I do not think a distant observer would be able to learn much about our history, and would surely not be able to observe our art, literature, and scientific writings.

Dinosaur, I imagined there would be such difficulties but working on a theoretical basis the question really is whether light reaches that far or not. The earth is not a star, so I didn't know if it's 'dim' reflection would somehow be lost or not.

It seems motion and atmospheric distortion would be relatively easier to overcome (i.e. with redundancy in observing points, and other imagery correction measures). If the light itself somehow got lost then that would be the end of it, even theoretically, which was what my question really was about.
In practice all those technicalities you mentioned would probably be easier to solve than the real problems: to build telescopes that powerful and to move them that far out.
I'm sure most people at the turn of the 19th century didn't expect us to be able to produce satellites capable of orbiting the planet and with a photographic ability that allows the reading of text on a book laid on the ground.

Watching our own past from above is all science fiction but, as far as I understand now, it could one day become science fact.

Edit: even though you couldn't witness anything significant events that happened at night and neither anything indoors, or under clouds, the thought that one could watch our own evolution or even the evolution (and demise) of the dinosaurs is very appealing. Many events reported in literature could be checked for accuracy (imagine the meaning it would have for religions).

Even faint light travels until it is absorbed by something, so in theory light from the Earth could be seen thousands or even millions of light years from Earth.

It is not likely that anyone from Earth could travel fast enough to the correct place to see any light from the Earth of his past. An astronaut could easily see light that left the Earth after he did.

As described in a previous post, very little information about human history could be obtained by an observer distant from the Earth.