I don't get it - even if you use a mirror, the distance is still the same. Light needs to go to the mirror, reflect and come back to your eyes, there's no difference if you're n lightyears away or just n/2 and use a mirror.
farico, you are exactly right, and that is the point. You just add mirrors to make the distance needed shorter and shorter.
I was just taking the example to a logical absurdity to reason that we could potentially make a small array of millions of mirrors, here on earth, that could see back in time in "real-time" if you pointed it at something.
But as I soon realized, this is basically a video camera =(
me ------| <- mirror
me ---|--- me
Do I get it wrong?