Questions tagged [faster-than-light]

For questions about settings in which superluminal travel and/or communication is a possibility.

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5
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1answer
169 views

It would be possible to enter and exit a black hole using a Warp Drive? [closed]

Well, a Warp Drive expands and contracts space, passing it through you, technically allowing faster than light travel. And so, it would be possible to actually enter a black hole and thus, exit it? I ...
10
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9answers
1k views

FTL in a relativistic universe: can my scheme be exploited to make a time-machine?

The introduction of FTL travel/communication in a relativistic universe may effectively be equal to having a time-machine with all the problems that may entail for causality. I would like to avoid ...
8
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2answers
265 views

Using transfinite numbers in a scifi story

I have been bandying about some exotic mathematics ideas as the basis for a hard scifi setting, and I wonder what technology/alien life would "make sense," here, given the physics arising ...
43
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21answers
6k views

Why are certain spaceships capable of warp at a moment's notice while others require some preparations?

After seeing an advert on my holo-watch about the latest fleet of interstellar spaceships capable of going into warp at the press of a button, I was both amazed and dumbfounded by it Conventional warp ...
16
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3answers
3k views

I come out of hyperdrive as far as possible from any galaxy. How isolated am I and what do I see?

I come out of hyperdrive as far as possible from any galaxy. How isolated am I and what do I see? My purpose is to carry out a top-secret experiment where space is as flat as possible. For this ...
5
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1answer
108 views

How fast could a Path Optimization Drive travel through Non-Euclidean/Discrete Space?

I have an idea is for an FTL drive based on the theory that our universe is both Non-Euclidean and Discrete at the Planck Scale, but is instead better represented as a series of interconnected nodes. ...
3
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2answers
977 views

What is INSIDE a Wormhole?

IF they were real, would wormholes work in the way that they do in sci-fi (for all intents and purposes "teleportation", travel without movement, FTL, immediately "appearing" at the other location), ...
5
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2answers
861 views

Crew member overboard! Interstellar Space Edition [closed]

I am just curious what would happen to those poor souls whom are thrown overboard while the spaceship which is enveloped in a warp bubble, does the bubble acts like a firewall similar to the black ...
19
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18answers
5k views

What mandates travel in an interstellar society?

A while ago this question on medieval travel was asked. I looked at it again today and it got me thinking about situations that would mandate travel in other settings, in particular what would force ...
-2
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2answers
1k views

How long would it take to colonize the galaxy with FTL? How long before colonization space is at a premium? [closed]

It's easy to find search results for how long it would take without FTL - but I'm wondering how long it would take with FTL, and there don't seem to be many estimates for that. Some very rough ...
6
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14answers
6k views

Effects of being hit by an object going at FTL speeds

This will be a question that I am fine with having less realism in. I was thinking of a weapon, like a spear, that can go at FTL (faster than light) speeds. To be clear, the spear is FTL due to ...
29
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11answers
5k views

Does my concept for light speed travel pass the “handwave test”?

Basically my idea for a light speed travel concept (not faster than light) is the Zero Mass Field. I am aware that as far as we know this is impossible, but want to know if this makes logical sense ...
5
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3answers
478 views

FTL Drive Reality Check

Inspired by this article, which refers to two other articles. (article 1) (article 2) These articles suggest that the permittivity of free space ($\epsilon_0$) might be adjustable by changing the ...
3
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2answers
225 views

What if the speed of light was based off wavelength?

Im making a sci fi story (first part here) and I needed a cool and interesting way to make ftl communication possible, at first I thought, make the speed of light infinite but thats kinda boring so I ...
2
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2answers
126 views

Ways to make the time travel aspect of FTL to be as hard as possible? [duplicate]

As I understand it, thanks to the General Relativity it is absolutely impossible to have both relativity and FTL without the latter opening you a way to get into your past thanks to the relativistic ...
65
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25answers
14k views

How to prevent superluminal traveling idiots from wrecking half of the universe?

Linked but not a duplicate of this question. An example of the problem During the last Star-Wars movie, I was dumbfounded by the sheer stupidity of admiral Holdo's move, during this particularly ...
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8answers
2k views

Selling real-estate in space. How can it be allocated and how can it be marked out?

Space is useful for storage. In the future there is a thriving space real-estate market. Generally speaking, space in orbit is more desirable than outer space but both have a market value. How can ...
4
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3answers
252 views

Exploiting Time Travel FTL Mechanics to Create FTL Without Time Travel

A while back, I asked if FTL drives mandated time travel, and I was referenced this previous question: Are there any ways to allow some form of FTL travel without allowing time travel? Where the top-...
5
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4answers
283 views

Which hypothetical faster-than-light drive is more realistic?

I'm beginning to put together ideas for a science fiction story featuring interstellar travel. I want to put an emphasis on the "science" in science fiction for it though. In that I'd like ...
21
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18answers
5k views

What are plausible faster than light methods for a far advanced civilization that aren't a warp drive

Hopefully the title sums it up well, but I'm looking for potential faster than light travel (hoping for real or pseudo-real science here, as much as possible) that doesn't involve a warp drive, which ...
11
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9answers
2k views

A plausible explanation for the “ansible?” - FTL communications

I need FTL interstellar communication in my story. Ursula K. Le Guin first used the idea of the "ansible" as a fictional device or technology capable of near-instantaneous or superluminal ...
3
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11answers
3k views

Can FTL travel be achieved with mid-20th century technology? [closed]

Let's say that the FTL system is based upon that of Star Trek, but deviations can be made. FTL technology was discovered through the reverse-engineering of a starship that crashed on the civilization'...
46
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19answers
7k views

How can I justify a Type III civilization using planetary jump drives instead of FTL starships for galactic commerce and travel?

I have this idea for a science fiction story (It actually came to me in a dream.). In the distant future, the inhabitants of the Milky Way have formed a galaxy-spanning civilization similar to the ...
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7answers
2k views

What would happen if the speed of light was fundamentally faster?

Now maybe this belongs in physics, but I want it here because I'm interested in the impacts on our society if the speed of light (c) were to be 2x faster since the big bang. My first thoughts were ...
4
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6answers
642 views

Is it feasible to use light as a transmission vehicle?

Let's just say I'm no scientist, so my understanding of these things is all surface. Having said that, I don't write hard science fiction. But I'm not quite as "magic-like" as Star Wars. My ...
3
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3answers
327 views

What would one experience travelling through an invisible Krasnikov tube, and how much could they be used to cut travel times?

Effectively what the title says; What would different observers experience while travelling through / seeing one travel through the tube, and how could they be used to cut travel times? (Just ...
3
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4answers
221 views

Military strategy in a world of fixed opaque wormholes [closed]

(This is based on the old wargame Starfire... but don't bother providing answers based on newer versions of said game.) Spacecraft travel by inertialess drive -- that is, beyond mere reactionless ...
8
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2answers
233 views

What would the gravitational wave signature of an Alcubierre drive look like?

I can imagine the proliferation of Alcubierre drives in the distant future, which would distort space so it takes the shape of a Mexican hat in 4D map. I am wondering, what would the gravitation wave ...
5
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1answer
178 views

Would Alcubierre Drive Technology Allow for Artificial Event Horizons?

So, my understanding of how Alcubierre drives would theoretically work is not particularly complete. I know it involves compressing and expanding space, but I don't really have an intuitive grasp on ...
2
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2answers
110 views

Could Kerr Metric Black Holes hypothetically be used for Interstellar Information Transfer?

Kerr Metrics should (extremely hypothetically) allow travel into "mirror" universes. However, I have heard that some theories estimate the time-swapped black hole on the other side of the ringularity ...
4
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5answers
308 views

What FTL models are appropriate given my constraints?

I'd like to have faster-than-light travel (and communications) be an late-game option for a video game I am working on. The extent of the playable universe is approximately 4 million light years in ...
3
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1answer
96 views

Can cherenkov effect be used for telling how fast FTL spaceship moves?

Imagine an alternate universe where FTL do happens, let's just say the inhabitants discovered a hypothetical particles that allows ordinary matter to temporarily be in superposition of any amount of ...
8
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5answers
396 views

Can we safe FTL from paradoxes by using a Multiverse?

As we know, bi-directional faster than light (FTL) travel can cause paradoxical situations. One possible way to resolve this would be a multiverse theory: Whenever a paradox could arise, the universe ...
5
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2answers
324 views

How to build a wormhole for FTL communication? [more Engineering than Physics question]

I came to SE WB while I was researching about space radiators for my sci-fi. I don't remember where exactly I found an answer to my question (Maybe? Idr) but I stunned with this site. You all looks ...
62
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9answers
8k views

Are there any ways to allow some form of FTL travel without allowing time travel?

Faster than light travel is a really cool thing to have in sci-fi settings. It allows humans, in relatable time scales, to travel the galaxy and see a variety of worlds. It allows for conflicts ...
0
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1answer
188 views

I have a way of giving something negative mass. Did I just end the world,or usher in a golden age of space travel?

So, somehow, I have discovered a process that makes an objects mass negative. Not its weight, its mass (although, I guess that the weight would also become negative). The thing is, before I try it, I ...
1
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1answer
111 views

What would the view from a spaceship traveling through inter-galactic space look like?

My character is traveling aboard a spaceship through inter-galactic space (it has left the Milky Way). The ship is traveling at the speed of light or so and has been for the last six thousand years. ...
2
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2answers
117 views

What would a telescope need to be able to do to see all of the universe? [closed]

If humans are still around in say 2220, what would a telescope have to be able to do to see the edge of the universe (This is also with caveat of FTL being possible)
6
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10answers
3k views

How fast would a civilization with FTL spread out?

Let's say that a civilization has access to FTL. Let's say it is instantaneous so travel time between solar systems isn't a factor. How long would it take for them to spread out from their home solar ...
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11answers
11k views

How much would we learn from observing an FTL starship fly by?

On a mythical world almost identical to our own, deep space telescopes notice as an object appears out near the orbit of Jupiter. In the instance after its appearance, the light which bounced off it ...
1
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4answers
623 views

What is more “plausible” as an FTL power source?

I’d like to avoid antimatter for a specific story purpose. In that case, which is a more “plausible” way to power an FTL drive: An artificial black hole An artificial neutron star (“neutronium”) ...
2
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0answers
54 views

Warp speed collision [duplicate]

I was hoping that i can get a more or less science based answer because theoretically warp drive is possible (but we cannot produce the amount of energy that it needs). I am here after this question ...
1
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3answers
135 views

Why does FTL travel require a human who can survive in space? [closed]

Imagine ftl space travel that requires modifications to the human body enabling them to survive in space without a spacesuit, possibly even truly skyclad. What mechanism for ftl travel might require ...
7
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5answers
3k views

How to resolve the transporter conundrum in a FTL spaceship?

Imagine a spaceship capable of achieving faster than light travel uses several transporters to allow crew members to move around its interior at the constant speed of light. What happens to the crew ...
8
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2answers
2k views

Can anyone explain this preprint physics paper for FTL travel?

I'm writing a Science Fiction tale, and I am trying to get something together on the FTL physics involved in the story. By chance I came across this paper, "A General Local Causality Principle of ...
6
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5answers
243 views

FTL Existence provability?

Inspired by this question about learning from FTL, I wonder Is it even possible for anything to happen, that, if observed by us using methods available to us, will unmistakably and absolutely ...
3
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4answers
238 views

What effects would we see on Earth if the speed of light universally increased? [duplicate]

Traveling faster than light poses all sorts of physics problems, so most hard SF has had to handwave FTL. But if light were faster, then ships could be commensurately faster without violating ...
4
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3answers
281 views

A good way to explain FTL without literally referencing FTL? [closed]

So I making a story where there is FTL travel, but it is never referenced as actually being FTL. What is a good explanation of this, while still cutting a 4-light-year trip to a few hours?
2
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4answers
480 views

What kind of faster-than-light travel is this and is it at least plausible?

I've had a fairly complex world built up in my head for several years and finally writing a story in it. One thing I'm struggling with is explaining the galaxy's faster-than-light traveling. It's not ...
2
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3answers
196 views

Would quantum entanglement allow for FTL space-travel? [closed]

An important feature of quantum technology is entanglement (i.e., two or more particles are linked, so changes applied to one particle will be applied to the other entangled particles, no matter the ...