Cosmological horizon

[laughs]

"If dark energy continues accelerating the expansion of the universe until distant galaxies disappear beyond our cosmic horizon-

Hmm

... could a civilization in the far future eventually have no observable, observable evidence that those galaxies or even the Big Bang as we understand it ever existed? If so, could a scientifically advanced civilization develop a completely wrong picture of the universe simply because it was born too late? I'd love to hear all three of your thoughts on this.

And that's only one of many likely infinite superclusters in the universe.

Wait, literally infinite? Wow! Unfortunately, we can't know whether the universe truly is infinite or not because of a little thing called the cosmic horizon.

We can only see the light that has reached us from the start of the universe 13.8 billion years ago.

Simply looking into the sky is an act of investigating history, and the farther we look back, we begin to see more primitive things, the first stars and galaxies.

Mind you, the light we observe billions of years after it first shone and the continued expansion of the universe means that the cosmic horizon is approximately 46 billion light years away by now.

Roughly double that, and you know that our little cosmic bubble is about 92 billion light years across.

I mean, compare that to our already huge 100,000 light year galaxy.