this post was submitted on 11 Dec 2023
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[–] [email protected] 78 points 11 months ago* (last edited 11 months ago) (30 children)

Uh, no shit? That's how light works once you're able to travel at relativistic speeds - communication over interstellar distances using light is going to take ages.

Even within our own solar system interplanetary travel will have significant communication time delays.

Edit: also, we already know that matter and light can't exceed c, but I wouldn't be surprised if we discover that other forces (gravitation, or another that we haven't understood yet) can transmit information at speeds >c. I wouldn't be surprised if we turned to quantum entanglement for instantaneous communication over extreme distances either.

[–] [email protected] 24 points 11 months ago (8 children)

My first thought was 'no shit' as well. There's a horrible heartbreaking anime about that.. Voices of a Distant Star.

other forces ... can transmit information at speeds >c

I sadly disagree. Even if we figure out a way to instantaneously transport ourselves across the universe, there will be some shitty clause in fine-print that says we can't go back, or it took 0 time for us but 1 billion years for everything else.

Check out this video by Anton Petrov:

https://odysee.com/@whatdamath:8/woah!-someone-just-sent-an-impossible:4

[–] [email protected] 10 points 11 months ago (1 children)

or it took 0 time for us but 1 billion years for everything else.

That's just time travel with extra steps!

[–] [email protected] 11 points 11 months ago (1 children)
[–] [email protected] 3 points 11 months ago* (last edited 11 months ago)

We are all currently time-traveling at a ratio of (edit: roughly) 1:1

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