Quote:
Originally Posted by arjaybe
The light that reaches us was emitted by the galaxy before it reached the threshold. The light it emits after crossing the threshold will never reach us because the intervening space is expanding by more than a light year per year. In no case is any of the galaxies moving at anywhere near light speed.
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Like a ship sailing away until it goes beyond the horizon.
Once the galaxy passes the universal horizon it effectively becomes part of another universe in a type 1 multiverse.
If we could track a galaxy crossing over it would be really cool.