Gravitational Lensing

Not always but we can reproduce your findings in the future - credit to gravitational lensing causing some light paths to years longer to reach us.

Thanks!!He doesn't mention any gravitational lensing, so I assume you'd need a far more massive BH for that.

It is not known with certainty that very small actions across very large distances have any effect at all. It's possible that, just like you're literally seeing a past version of a galaxy, you're also literally seeing a less precise version of the galaxy.

How do they know the photons were from billions of years ago?

Couldn't it bend the light enough that it looks to be dimming to us?

no, due to gravitational lensing, you can see stars. For a straightforward break down, see Dr Becky, https://www.youtube.com/watch?v=VChgsXbIgdw

This is called gravitational lensing https://en.wikipedia.org/wiki/Gravitational_lens

I'm not a scientist or anything, but your optical illusion, could it be this?https://en.m.wikipedia.org/wiki/Gravitational_lens

You don't even need a wormhole. Light can "reflect" (ok more like slingshot) around a blackhole 25 million light years away, giving us a direct visual path to our own planet 50 millions years ago.Of course our telescopes don't have anywhere near the resolution for this right now.

Well the photons leaving earth are scattered in almost all directions. So at 1500 light years there might not be any photons arriving from that exact moment and place on earth because you might be down to say 1 photon arriving per hour or even less. Then the photons coming back would be all mixed in with other photons from the black hole so even if the same photons did go to where earth will be, the picture would be mangled beyond repair, and the darkness of the data you’re trying to capture is