Theoretically if I was 66 million light years away from earth and had a telescope strong enough would I be able to see the dinosaurs if I faced it towards earth and nothing was obstructing my view?
I totally expect people to be able to see into the past, eventually, in similar way that OP describes. That includes intercepting the light that gets reflected back to us from somewhere in deep space, or phoning a far away civilisation and asking them what they see/saw.
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