I think it is more than a theory, but light bounces off the planet, actually it bounces off all planets, and somewhere out in space bouncing around, is light that hit the planet Earth a thousand years ago. I have no idea what the energy levels in light are and how long it takes for light to dissipate but I was always fascinated at the thought that astronauts could travel into space and catch up with light that held the images of past events.
How many? All and everything? We might not be able to talk to the images but we could observe. Would these images need enhancing or would they be perfect and would we see as if we had been there. Could we travel with them effectively slowing them down? Would we be able to learn from them, by seeing expressions on faces or solve riddle by actually witnessing the events.
I don’t suppose we will ever know, or ever catch up to historic light. We would need new technology because I am sure some of the light that hits the earth today is not all from the sun and no one has said they have seen anything from another planet in these terms.
Maybe someone should write a book about it.
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