…it would be a ‘border’ between nothing and nothing?
In: Planetary Science
>what would the edge of the universe even mean
You’re the one using the phrase. If someone else is using it, they should indicate what they mean.
If it is edge of our observable universe, then it just means anything beyond that surface is causally detached from you. Anything even an infinitesimal distance beyond that edge would never reach you, even if you were immortal and it was travelling at light speed in your direction.
So what else might we choose to be an edge of the universe?
* Maybe some surface beyond which there is no matter. If the space continues though, you could theoretically keep going.
* Maybe some space surface beyond which the fundamental physical laws as we know them cease to hold? That’d probably be a pretty hard limit on where you could go even if FTL travel is possible. This one might speak to your “border between nothing and nothing.” It’d be “nothing but possibility of something” on one side, and “nothing even possible” on the other… but is there such thing as time/location/dimensions/sides/etc. there?
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