I'm very sorry for probably posting this in the wrong place, but I'm kind of a newbie when it comes to physics. this is a question I've had for a long time, and it is really giving me problems sleeping, as i keep wondering if it(at least in theory) could be possible.. here is my question: do you think it would be possible to somehow gather in the light that has been sent off earth while it has been here, and somehow use it to piece together a "film" of what has happened on the planet while it has been here.. so that we would send something out there to gather/watch the reflected light and the light we have produced on our own, to find out anything about the planet? and I realize that to do this we would have to send something faster than light itself to see this.. but what if some of the light(or images, if I may call it so) have hit some obstacles on the way, and then been reflected against ourselves again, could we then possibly find something in this light? I hope I expressed my self clearly enough to get a good answer to this. thanks for all opinions on this, I wish I had a broader vocabulary, then i guess it could be a lot easier to explain what I'm trying to ask.