Is time-travel logically possible?

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>>8454468
If we put Time as another dimension than logically it should have movable directions. we are stuck in this bounded time called now. Which shouldn't be the case. Anyhow, Travelling back in time is not possible because that would change the history timelines of Space.

Honestly I think it's just what ScuFic writers do to fuck it up. It would not be possible to Time travel ever for humans. Period

>>8454468
Hur dur time travel is possible because we're going into the future

But I remember some physicist talking about how you can have a mass that bends spacetime in such a way that it loops into the past or something. He said that's the only way it could be possible to go back as far as we know, it could possibly have something to do with black holes.

>>8454491
>Travelling back in time is not possible because that would change the history timelines of Space.
What do you actually understand by that?

>>8454491
You are assuming that you can change the reality of your timeline.
Take the famous grandfather paradox...What happens to you if you kill your grandfather?

Well we could say that since you exist then noone killed your grandfather.
So any attempt would simply fail.

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1: People are interested in the past and would like to see what it was like.
2: If something is possible, people will try to make it work.

Since we aren't being flooded by tourists, historians, archeologists, anthropologists, etc from the future, I must conclude that - regardless of whether or not it's even possible in the first place - humanity will never achieve time travel.

Sorry, aspiring time tourists.

>>8454590
>>8454604
Not if you are able to time travel but not inside of your original timeline.
What if, by travelling through time, you go backwards and create a new timeline which starts at the time you "arrived" in the past.

Or what if it is physically impossible to meet yourself, so whenever you timewarp (or whatever you want to call it) you substitute your former self with your new self.

And now imagine that, by going back in time, you substitute yourself PLUS every information you might have known after your arrival is cleared from your brain.

A time traveller wouldn't know about this because he loses his memories.
He would live his life until he (again) gets the idea for time travelling, porting himself back to another time, "deleting" his older self again and again lose his memories.

All of this is fantasized bullshit with no scientific relation, but so is time travel.

Btw: what do you think about Tachyons?

>>8454544
Black holes are spooky

>>8454590
IF an infinite amount of universes exist with an infinite amount of possibilities. Wouldn't it be fair to say there exist an infinite amount universes where time travel occurred based on the person who time traveled and what they did.

Meaning no matter what you do, you will always be stuck in the universe where you were bound to do x-in time to end up in that situation, and by "time traveling" all you're doing is ensuring one of many infinite universes comes to existence from your destined action?

By killing your Grandfather all your doing is creating a universe where your grandfather was killed by you, but you still exist in the original universe you come from because its not part of the universe where u killed ur grandfather.

>>8454657
Yes of course.
Anything logically possible would occur in that reality.

>>8454468
Its possible for particles to exist everywhere until you observe them so yes it should be possible.

It depend about the shape of our universe and the shape of time itself
Tell me how is your mental representation of time and space is and i could tell you somes things

>>8454604
So you're concluding that an absence of evidence is evidence of absence?

What if time travelers are here now, disguised following some 'prime directive' protocol?

What if they're locked in psychiatric institutions like Bruce Willis' character in 12 monkeys?

What if the government knows about them and keeps them away from the public knowledge?

You're absolutely positively confident that just because you, a nobody anon from 4chan, don't personally know about time travelers, then time travel is a physival impossibility.

Rrriiight, how about we keep thinking about it a little bit more.

>>8454675
>the shape of time
Anon only matter can have shape.

>>8454468

logically as in a logical framework, not physics?

>>8454678
general relativity states that energy can warp the curvature of space and time, which implies a shape does it not?

>>8454491
Isn't "changing the history timelines of Space" just the transition into a different universe?

>>8455061
there is no such thing as a different universe; it's a complete set.

>>8454468
No.

>>8454544
>that's the only way it could be possible to go back as far as we know, it could possibly have something to do with black holes

Well, as discovered by Einstein, anything can be solved using quantum nano-carbon real and complex triple integral theory. Bill Nye and Neil Degrasse Tyson predicted that this will be a reality in less than 5 years.

>there are more popsci articles on the internet than there are particles in the universe

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that's outside our light-cone

>>8454468
Yes.

>>8454544
What he's probably describing is a Tiplar Cylinder. However, it's long since been proven that Tiplar Cylinders are likely impossible as a working one would require either:
A) A cylinder of infinite mass and length
B) Negative energy (if such a thing exists, which it almost certainly doesn't)

james gleick just wrote a popsci abook bout this

>>8454468
>Is time-travel logically possible?

No.

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>>8455956
(continued)

Time is a mental abstraction, and is not a real part of the universe in the sense of "Dimensionality"

Time is merely the rate of change, and as such isn't a "Dimension", but a scalar.

The mathematical model of relativity has done a particular disservice to the scientific community, by conflating "Time" and "Distance" as mutable, while maintaining that "Speed" (which is distance over time) is constant.

IT is a poor mathematical model that utterly fails to understand the basic concepts of measurement of distance, time, and speed, and thus posits that it is possible to travel through time, when time isn't something that can actually be traveled "Through"

Hence, "Time Travel" is a bullshit concept, popularized by Einsteins inability to be a SCIENTIST, as opposed to a math stealing patent clerk.

The reason that the scientific community "Believes" in relativity, is because of the cult of personality erected around him by those who own the mainstream media, and the fact that most of them are of the same "Religious Ethnicity" as him, elevating him to the status of "Science God" or something.

Relativity is a cult of personality.

>Guys, if we travel faster than light, Entropy reverses throughout the entire universe at superluminal speeds!

Sure, kid.

>>8454468

Time is just a perceptual descriptor used as a mental shortcut to express and interpret other stuff doin' its physics thang, anon.

If your physics thang is doin' different than the physics thangs immediately around you, you're said to travel in time.

Just gotta figure out what those physics thangs are, is all.

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>OMg, Guys, look at this light cone! It posits that if we send a superluminal signal to anouther space ship, it violates causality, as opposed to only APPEARING to violate causality when perceived by photons!

Whatever you say, doc brown.

>>8456008
>OMG that picture!

>Ship outraced it's light signal, so viewing ship sees more than one ship at the same time!

>CAUSALITY VIOLATION!!!! LOLZORS! SHIP TIME TRAVELED BECAUSE WE SEE BOTH AT SAME TIME!

>>8456002
uh huh

>>8454468
ITT neckbeard doctor who fans

>>8456002
That's what Tesla said on his death bed minus the Jew part. Einstein denounced quantum physics too.

I have a thought experiment. Is it possible to send rays into the future the. Why aren't we doing it? We can detect rays from the past right?

Well according to modern physics it is possible to travel forward in time, by which you simply travel slower through time relative to everything else (either by being near a source of intense gravity or traveling near the speed of light).

>>8456197
Which is as useful as just going to sleep.

Every night I go to sleep and bam, I wake up 7 hours into the future!

Fry was frozen for a thousand years and "travelled to the future".


The only challenging time travel wold be to the past.

I dont see why not. All the problems that arise from backwards in time thought experiments can easily be dismissed by simple arguments.

>>8454468
You cannot go backwards in time.

Many physics processes have multiple ambiguous previous states. Signals attenuate into noise, information can be destroyed. The past is gone.

>>8456550
how do you get
>The past is gone.
from
>Many physics processes have multiple ambiguous previous states. Signals attenuate into noise, information can be destroyed.

We arent talking about recreating the past, but traveling to it.

>>8456555
and how do you propose you do that?

Wormholes aren't real. The complete information that comprised the past no longer exists in the future.

Propose that you created an extremely large telescope and put it 65 million lightyears away. Even if the telescope had a resolving power high enough to see dinosaurs the millions of lightyears of diffraction has already destroyed the image.

Time travel is a waste of mental effort. Actually nevermind, you brainlets waste your time on time travel.

even if time travel is possible what's the point of it if Earth moves through space as quickly as it does? it's not like it's possible to actually go back in time and land on Earth, or is it

>>8457290
If we're letting you go back in time arbitrarily, we might as well move you in space too.

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>>8454468
You are time-traveling right now!
A few micro-seconds or nano-secondw in the past.
How about ending an conciousness? Stopping time for that conciousness while the rest moves on, because it is non-existing now and can not experience time and isn't influenced by it. It's living in a point in the past after the destruction of the physical neurostructure ( or any structure what's however) pattren. It's dynamic ended in a point in the past while the future is yet to be formed by those flowing along and yet, the lonely conciousness is never able to feel the feeling of shaping a future again.

Feel free to comment on this, to debunk me, critigue me, I would feel honoured to.