Questions tagged [faster-than-light]

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

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7
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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
190 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
232 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'...
45
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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 ...
4
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6answers
629 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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4answers
210 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 ...
7
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2answers
199 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 ...
2
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2answers
95 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
286 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 ...
4
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1answer
157 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 ...
3
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1answer
89 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 ...
4
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3answers
254 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 ...
8
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5answers
349 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
237 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 ...
0
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1answer
161 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
106 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
110 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)
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10answers
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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 ...
1
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4answers
594 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
53 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
127 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 ...
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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 ...
6
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5answers
236 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 ...
50
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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 ...
3
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4answers
235 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
276 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?
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2answers
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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 ...
2
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4answers
431 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
189 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 ...
6
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4answers
523 views

Would there theoretically be an accompanying effect to something moving beyond the speed of light?

I have only encountered the "Sonic Boom" a couple of times in my life, once when I was lucky enough to watch Concorde fly over my town in the late 70's. In a story I'm writing someone claims to have ...
2
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3answers
229 views

Are there any hypothetical FTL drives with a near-zero net energy loss in optimal conditions?

A hypothetical FTL drive that I have imagined takes energy to enter FTL state, but almost all of the energy is retrieved once exiting that state. This way energy requirements will be low enough to ...
2
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5answers
168 views

What resources would Earth want from a STL colonial civilization? [duplicate]

In the year 21XX, Earth sends several slower-than-light ships to colonize Earth-like planets. The atmosphere, topsoil mineral composition, and the frequency profile and intensity of light on these ...
8
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3answers
450 views

If an Alcubierre Drive is possible, can you communicate FTL without a vessel?

Assume that an Alcubierre drive is feasible. In fact, assume that one has been built. A superluminal starship can propel itself through space by distorting space in front of it and behind it. However, ...
6
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2answers
427 views

Escaping a blackhole with an Alcubierre drive?

If your ship just got trapped inside the event horizon of an super massive black hole, could the ship "accelerate" back out with an alcubierre drive?
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13answers
7k views

What plausible reason could I give for my FTL drive only working in space

I’ve created a fairly fleshed out, detailed FTL concept. Basically, you have a circular starship, with a ring of tungsten encircling that, held in place by an antigravity ring beneath it. The rim of ...
11
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5answers
2k views

If you had a giant cutting disc 60 miles diameter and rotated it 1000 rps, would the edge be traveling faster than light? [closed]

As if there was a giant angle-grinder in space that slowly increased its speed. The question assumes that material exists to make this super-disk that doesn't rip apart. What happens as the edges ...
3
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3answers
327 views

Are there any issues with this FTL drive concept?

I asked a question earlier on here concerning Negative and Heavy Matter - hypothetical types of matter I created to have a working FTL drive. With some extra work, I’ve tweaked the concept and been ...
2
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5answers
427 views

Minimum speed required for a galaxy spanning empire

The dawn of the Galactic Empire! Assume that FTL travel and communication is possible, for simplicity we say c is the speed of light. Assume any speed of travel and communication < c*2^100 is ...
15
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5answers
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How could a civilization detect tachyons?

In an effort to work out a believable form of faster-than-light communications for my setting, I've ruled out a few things: wormholes (which are in use, but are too random in where they lead, to be ...
2
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5answers
271 views

Trying to make sense of a hyperspace type FTL

Can a 'hyperspace' make sense if matter entering it is very quickly 'dumped' out of hyperspace at another point in our space. That is to say, spaceship enters hyperspace and is almost immediately ...
2
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2answers
716 views

What would be the ramifications if you were to increase the speed of light by at least a factor of 10? [duplicate]

I know that the wave lengths would be shorter but how would this extend habitable zones? Would zones disappear? Would other stars have an effect on Earth? If so, then would that counteract the ability ...
4
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3answers
479 views

Non-causality-violating FTL travel. / Can omnipotence beat causality?

While building my sifi world I dug into ftl-travel and encountered these mean bullies, causality and relativity. They told me I can't have faster than light travel, because effect can't precede cause ...
7
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10answers
598 views

Military Implications of Instantaneous FTL?

In an example future world, one can use some form of FTL to instantaneously transport any ship from one point to another point (within the same galaxy, to keep things simple). The device required to ...
1
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1answer
68 views

Superluminal signal to past (alien technology) [closed]

With our current understanding of physics it is not possible to send anything into the past (although GR mathematically allows it). Could an intelligent alien species with a 100,000+ year head start ...
59
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23answers
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 ...
6
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2answers
372 views

Alcubierre warp-lanes, what is the most stable way to create them?

2 informational references for Alcubierre fields can be found at the end of this question. Warp-lanes aren't a novelty in science-fiction. Space ships can use a specific route to go through a Galaxy ...
1
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0answers
71 views

Can Artificial Expansion of Space Facilitate Dark Energy [closed]

Granted, not much is known about Dark Energy. Indeed, it may not even exist. What we know is that something is driving the expansion of space (understanding we do not live in a Hubble bubble). This ...