Taming wormholes
An ancient civilization mapped wormholes when the universe was quite young and smaller. This allowed them to reach other galaxies (wormholes from our galaxy to others). They mapped it all.
Humans found their maps in recent times, and now humanity is able to reach anywere in the universe thanks to those maps.
The question:
If there are wormholes in the early universe (let's suppose leading from the Milky Way to Andromeda), and the universe expands to a larger sphere, would those wormholes expand together with the universe, keeping the same relative positions to other celestial bodies, effectively becoming a space-highway system when properly mapped?
This post was sourced from https://worldbuilding.stackexchange.com/q/12571. It is licensed under CC BY-SA 3.0.
1 answer
Yes, the ends of a wormhole basically behave like a normal celestial body (assuming there's no additional physics not yet known to us that affects their movement). They would move with the expanding universe, and they might even orbit a star. However I have no idea what the apparent mass of a wormhole would be; it might as well be that the star orbits the wormhole, or even that (since wormholes need to be filled with negative energy density to be stable) they would be of negative mass and thus repel the matter around.
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