Subspace is the answer of course!
Okay just a hot take here, but I don’t think this is the biggest barrier to interstellar travel.
The worst thing about interstellar travel: no internet
Two possible solutions:
- No interstellar travel
- Selfhost everything
I once tried to set up a LAN game of Halo, and let me tell you I’m resigned to staying on earth.
Maybe by that point we’ll have actual AI.
Buddy can you imagine all the new alien pron in the new system though?
Also, I don’t think this is anything particularly new. It’s pretty logical of you think about it for a few minutes.
I mean space is pretty empty yea but I feel like it would be a pain in the ass to prevent a ship travelling at light speed from bumping into small to mid sized space debris. On the other hand, I am imagining with this much drive on energy techs we will be at some point able to come up with a solution to the energy requirement to power such a vessel.
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.
Gravity travels at c. The Alcubierre drive tried to use bubbles in spacetime to “bend the rules” in order to result in apparent >c velocities but recent simulations indicate the bubble becomes unstable when attempting to exceed c.
Then we need the Tim (Allen) Taylor solution.
Moar Power! Uhh uhh uhh uhh uhh
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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
or it took 0 time for us but 1 billion years for everything else.
That’s just time travel with extra steps!
It literally is time travel.
We are all currently time-traveling at a ratio of (edit: roughly) 1:1
They’re probably referring to quantum entanglement, which affects the entangled particles instantly.
Yeah but you can’t interfere with quantum entangled particles, if you do you break the entanglement. So it isn’t usable as a method of communication.
Something I’ve not been asked to get through my head about QE: If observing the entangled particle destroys the entanglement, doesn’t that mean we’d need “containers” of entangled particles to send a bunch of information?
You can’t send information with entangled particles. You just learn the state of the other particle by inference when you observe the first particle.
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For a variety of reasons, no information is actually transferred. Quantum entanglement can not be used to get around the limits imposed by relativity.
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This is a great analogy. Consider it
stolenpirated.So it’s not like: when I affect the hue (some attribute) of my half, the other half will change too? That has always been my understanding of it
No, measuring one particle collapses the entanglement and they no longer affect each other. It is a one time thing. You can’t modify them after they have been observed.
The problem with information traveling ftl is, that you’re very quickly running into paradoxes. So just by logic wanting to keep intact, I feel like ftl communication will be impossible
Logically it makes sense, but the real world is years and often we don’t use the right logical systems. It makes logical sense to most people that a heavy object falls faster then a light object ,but we know that is false (and a also a non obvious logical system that also shows it is false)
If you actually calculate the maximum speed at which information can travel before causing paradoxes, in some situations it could safely exceed c.
For two observers who are not in motion relative to each other, information could be transmitted instantly, regardless of the distance, without causing a paradox.
The faster the observers are traveling relatively to each other, the slower information would have to travel to avoid causing paradoxes.
More interestingly, this maximum paradox-free speed correlates with the time and space dilation caused by the observers’ motion.
From your own reference frame, another person is moving at a speed of v*c. The maximum speed at which you could send a message to that observer, without causing a paradox, looks something like c/sqrt(v) (very simplified).
C is more than just the speed of light. It is the speed of Causality. No information can travel faster than C in a vacuum. Gravitational waves already reach us faster than the light from events that cause them (i.e. neutron star collisions) Because small particles slow down the light over long distances, as they absorb and then re-emit the photons.
By the time we invent any sort of lightspeed travel, we’ll have long conquered quantum entanglement. If you have a signal transferred over a properly quantum entangled technology, the signal would transfer instantaneously.
Another option would be tiny temporary Einstein Rosen bridges. Sure the energy requirements would be hideous, but if we’ve figured out how to exceed C, I don’t think we really care about energy costs anymore.
You cannot transmit information through entangled particles, so probably not.
Oh, you already know about it. No one else should bother reading then.
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It might become like the days of sail. The fastest mode of communication might actually be the speed of ships. In order to get a message between earth and alpha centauri you might have to actually build messenger ships.
You might have to build small automated FTL capable ships with massive data storage capacity and then download all of the data you need to send and then set the ship off on its way.
Never underestimate the bandwidth of a spaceship full of tapes hurtling through the cosmos.
Star Citizen has a ship like that. A cabin strapped onto the largest engine that wouldn’t kill you, with data storage added almost like an afterthought.
Well, star citizen has a ship like that - it doesnt have any gameplay loops that make use of that though.
The futuristic version of never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway.
I was hoping the days of sail would be some kind of cool Sci-Fi movie or series.
Data storage ships is a thing in Beacon 23.
Why is this even an article? It’s obvious.
Somebody just watched the Expanse for the first time and thinks it’s a neat new thing to explain to the Earthers
That journalist is a real wellwalla
i knew the expanse would pop up somewhere in the comments! been working my way through the books and it’s great!
Is it weird that I’ve only ever read the books? I didn’t even know there was a show until recently. Is it any good?
It’s fairly good. Some things are a bit abridged for the sake of action and visuals. Like travel that takes weeks is sometimes happening within hours or days.
However the dialogue, writing and characters are pretty good. It did lack a bit in season 6 (the last one) but that’s because the material wasn’t there yet in the books and somehow it cuts things short with material from book 6 at best.
Thanks, I might check it out!
Also Passengers, starring Chris Pratt, has a mention of this too.
Have they never watched Star Trek, subspace relays people.
What exactly is subspace anyways?
Space is like a rainbow, subspace is equal to ultraviolet and hyperspace is infrared. At least inmy head cannon.
Subspace is what the warp bubble moves through
Ok, then it’s fictional. The theoretical warp drive that is consistent with Einstein’s field equations moves through normal space but just warps it in a way that it effectively moves faster than light (while locally obeying the light speed limit).
Though that still requires something with negative mass or gravity (I was very disappointed when they confirmed antimatter has normal gravity, I was hoping the theory was wrong on that).
There’s still dark energy and dark matter that are kinda odd
There is the idea that everything is shrinking instead of space expanding, which resolves the dark energy question.
Duh.
how could that be surprising??
_ /\ _
imo by the time we have lightspeed ships we may have faster ways to send info, imagine back 2000 years ago and we tell people we can communicate faster than the speed of sound
data can’t go faster than the speed of light
Yeah but physical objects also can’t move faster than the speed of light so in any scenario where that’s possible we’ve obviously either found a workaround or we were fundamentally wrong about some part of physics.
Maybe we have access to wormholes and we can just send radio waves through the wormholes Stargate style.
problem with wormholes is that you can send information into the past - so if you receive a message, does that mean you’re predetermined to subsequently send that message?
well, any going faster than light will have to utilize the bending of space-time, if it ever happens and the wormhole thing has even more problems
Speech can’t go faster than the speed of sound, sound waves… But then comes telephone networks
to be fair, it’s still both slower than the light signals that were then as are now the fastest possible form of data transfer.
saying “but someone might invent something” doesn’t mean shit to physics, it’s why we can always with confidence say that Perpetumobile are impossible
You’re missing the point
no, I don’t think I am, unless you want to make the argument that infinite free energy is just 1…n brilliant inventor(s) away
Quantum entanglement? (forgive me if dumb thought, quantum physics is magic to me)
Quantum entanglement can’t transfer data. As soon as you try to use the connection you break it.
Quantum entanglement is like this - you have two sealed envelopes. In one envelope the letter A is written on a sheet of paper and the other has a sheet of paper with B written on it. No one knows who has which envelope until it is opened. All opening the envelope does is let you know what is written on the piece of paper the other person has. It transfers no data between the two points as the data was already set.
doesn’t work, “reading” the entangled particles causes them to change state, thus you can’t know if it changed as part of sending a message, or just because you were reading it.
There is no “sending” The data was set when the particles were entangled. All you’re doing is moving a particle from point A to point B.
the data is still being “sent” according to the field of information sciences.
not that it changes anything about the physical impossibility
Now i’m visualizing a world where long distance communication is done with sound and you have screaming pipes across the continent
We have that. It’s called
TwitterX.You forgot Facebook.
But I’d agree Twitter is more akin to just shouting
You forgot Facebook.
But I’d agree Twitter is more akin to just shouting
There were pipes for large houses back in the day for talking…
Edit* for Link https://lafayettesquarearchives.com/1892-speaking-tubes-and-old-homes/
Btw that seems pretty cool to have in the house, and the also furnace is always useful especially if you have many enemies
Something like that but with amplifiers to repeat over tens of kilometers
Maybe if we have faster than light travel we can assume that we’ll have a faster way to transmit data. It’s possible there will be a transitional period where we move at subluminal speeds and can transmit data at superluminal speeds, but I don’t think being able to hit the speed limit ourselves will imply that we can break it with data.
Plus relativity will really fuck with things if we are able to reach the speed of light. Time dilation will reduce bandwidth from the perspective of the stationary observer because they need to sync up with a clock that will appear to get slower and slower. Maybe some kind of warp technology will avoid this, but if it doesn’t, this will apply even if the signal can be transmitted instantly.
I’ve become resigned to the likelihood that if we ever do get out of this solar system, it will either be unmanned probes (like the ones we’ve already sent, which are still debatable as to whether we can consider them outside of it or not yet; they’ve passed the heliopause but haven’t gotten to the Ort Cloud yet), or they will be effectively independent branches of humanity that will diverge and become their own thing over time. We’ll be in contact (assuming both sides survive), but it will be more like pen pals where messages take years to arrive and meeting up in person is impossible. The ship will travel for generations before arriving at its destination with a good chance that they’ll just die on the way or shortly after getting there unless they are prepared for further generations of terraforming moons and planets in the new system.
And with our current situations, even that seems unlikely. I’ll be impressed if we see a self-sustainable moon colony or space station during our lifetimes or asteroid belt mining.
AI will beat us out of the solar system by far. They’ll pack themselves up in Von Neumann probes and go to all the nearby stars at the same time. Then go on to the next furthest stars and on and on and on with some taking the plunge and venturing into the intergalactic void heading to another galaxy.
Our best bet would be to hitch a ride as DNA data. It will be modified on site to survive whatever world they come across, and then grown in tanks. They’ll be raised by robots or AI in similar bodies to that of the new humans.
It’s not a surprise, it’s just a concern being presented because it’s not a thought for the average person.
isn’t developing light speed spacecrafts a far more direct concern?
why even concern about communications when travelling such distances isn’t even possible.
I don’t see the point of the article.
Who would have thought that Doppler could apply to communication equipment, too! Shocking!
Next they are going to tell us that messages might take some time due to c!
Most people have missed the bit about time dilation messing up the clocks used in signalling, which I thought was interesting at first. However, surely the fix is just as simple as including a timing signal with the transmissions?
Yeah we solved this problem in the 50s by including a clock signal in some form with the data. Most modern digital communications use it.
If nothing else, you discovered a way to gloss over the impossible thing in a bad scifi movie. “No it works because we added a timing signal!”
I think the problem is less timing the messages, and more that the messages from earth will just get redshifted more and more as the ship accelerates, which will require an ever larger antenna to pick up. This also has the affect of bandwidth tending towards 0.
That’s what ansible is for, right?
Enders Game reference?
Booo. Orson Scott Card took that term from Ursula K. Le Guin.
I agree, boo to him but I did like that book
wait, what term? “Ansible”?
Yeah
It sure is.
The enemy’s gate is down.
Subspace interference.
Tachyons.
heh, just noticed your username. Excellent 👌
It’s time for a CAKE queue management algorithm with…ahem…interplanetary RTT scheme!
There was an early 2000s anime movie that explored this idea. It was called Voices of a Distant Star.
Honestly this seems like a future me problem.
trash site
“뭐?” = “What?” in Korean.
I tried to upload a GIF, but it auto-converted to a PNG. I don’t know if it is Lemmy or my client. You can see it here: https://getyarn.io/yarn-clip/d68f9dba-3745-42d2-a68c-53296b79abed
Ahh, that makes much more sense.
Quantum Entanglement
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