The Big Bang happened almost 14 Billion years ago. Theoretically speaking , if we could teleport (Instant teleportation) to somewhere that’s 20 Billion light years away from the Earth , if we looked at the Earth using a super telescope, what would we see?Would we see the Big Bang ? Would we see what there was before the Big Bang? Does such a place even exist? If no , would that mean the space is finite?
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We would see something very similar to what we see on Earth, because the universe is very large (if not infinite), homogeneous and isotropic. You'd see cosmic background radiation from about 380,000y. You'd see highly redshifted young galaxies.
Note that the furthest we can see, with a look-back time of about 13.7 billion lightyears (the time it photons have been in flight from there) are about 46 billion lightyears away, because the universe expanded while those photons were in flight. Still, if you teleported there (or traveled through a wormhole), you'd still see a universe that looked very similar to how it looks from Earth.
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