Questions tagged [faster-than-light]

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

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6
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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
199 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 ...
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10answers
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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
210 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
243 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
341 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
155 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
514 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
210 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
144 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
300 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
357 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
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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
296 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
378 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 ...
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5answers
3k views

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
218 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
706 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
377 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 ...
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10answers
566 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 ...
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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 ...
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23answers
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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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2answers
310 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 ...
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0answers
59 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 ...
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5answers
391 views

Shooting down an enemy ship at FTL speeds

In the story I'm currently working on an alien race holds the monopoly on FTL travel. They're using a modified Alcubierre drive system, powered by Negative Mass. Humanity stumbles on a source of ...
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4answers
290 views

What kind of fuel would spaceships capable of faster-than-light travel use? [closed]

In my book series, faster-than-light travel is a thing, allowing the fastest spaceships to cross a Milky-Way-sized galaxy in a matter of days. The slower ships could manage that in about 2 weeks. ...
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18answers
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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 ...
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2answers
102 views

Long-term effects of leaving everything you know - the aging issue

My current ongoing science fiction project has FTL travel that is instantaneous for the ships and their crews, but still, usually, takes years of real-time in the rest of the universe. This is going ...
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3answers
3k views

How can I locate myself in a random point of space?

Some Context I'm creating a universe where humanity has reached the stars. They've colonized a few star systems and, obviously, FTL drives are a common thing. They basically jump you to another ...
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13answers
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Law enforcement in FTL civilization

The civilization has discovered an semi-unspecified type of FTL drive and spread among stars, but only a small portion of the stars in the galaxy is explored, settled and administered. Beyond the edge ...
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12answers
2k views

How can I know where to point my spaceship?

Let's assume we have a working FTL drive and thus interstellar travel is possible, either by traveling at very high speeds or by instant teleportation (the two main subtypes of FTL drives in sci-fi). ...
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2answers
205 views

How to travel between planets on the same star system in Sci-Fi? [closed]

We know, that to travel to another star systems, we need to use FTL for traveling. But if you need to travel to another planet in the same star system, what type of travel should be used? Is it worth ...
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3answers
393 views

How can I choose and combine multiple FTL systems in my Sci-Fi story? [closed]

So, I cannot decide which FTL method should I use. I can do it easy way - just call it "Jump" and that's all. But I something more. So I want to combine some methods, like jumps with stargates or ...
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21answers
6k views

How to explain why humans weren’t encountered by alien species? [closed]

So, I’ve been writing a sci-fi novel that takes place a few centuries in the future. In the novels lore, it says that there was plenty of life throughout the galaxy, but humans were just contacted ...
26
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13answers
5k views

The worlds between, the consequences of instantaneous FTL

For some time I've been working on a universe with non-instantaneous Faster-Than-Light travel, but I've decided to open a new universe with instantaneous travel. So I'm working on the differences that ...
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2answers
208 views

What would happen if an object traveling faster-than-light, with negative mass, crashed into something moving at sub-light speeds? [closed]

The warp drives I have defined for my science fiction setting work by creating a field which gives the ship a net negative mass to allow for faster-than-light travel. What I want to know is how an ...
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3answers
246 views

How flat is “Flat Space”?

The idea of "Flat Space", an area of space-time with minimal, preferably zero, gravitational curvature, is an important concept in many Sci-fi universes, often those with "jump-drive" based FTL travel....
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2answers
658 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 ...
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4answers
226 views

Which of these two spaceships would count as the fastest man made craft ever launched? [closed]

For a while now, I've been "working" on a story where mankind begins to set out towards the stars; and in my procrastination I started to get hung up on something. In the universe I'm working on, ...
38
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9answers
6k views

Interstellar war without co-ordination, is fine timing important at these scales?

I've been working, on and off, on a universe with limited FTL based on the "one big lie" principle of sci-fi writing; travel speed averages just a hair over 4 times the speed of light, travel is ...
3
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5answers
346 views

The Paradox Men - Cosmology

In Charles L Harness's 'The Paradox Men', a spaceship crashes on earth several years before it launches, having circumnavigated the universe faster than the speed of light. It is a good read, but I ...
3
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3answers
415 views

Could a huge pole that's moved back and forth be a method of FTL communication?

Here's the plan for the proposed system of FTL communication. A huge pole made of the strongest solid in existence (or whatever solid would work best for this scenario, if no solid exists that would ...
6
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2answers
254 views

Wormhole travel system: how would they connect the systems?

Here, star systems are connected with "wormholes". The wormholes facilitate travel at $250\ c$, regardless of mass. They are made using special ships. Any travel (including military vessels) not ...
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5answers
1k views

Could alcubierre warp drives spell the end of fleet on fleet combat?

In this scenario let's assume that we have the technology, and exotic matter to build one and have the energy to reach the 0.62912863×10^11 GJ (700 kg mass energy equivalent) requirement under Harold ...
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2answers
347 views

tachyonic FTL travel?

Suppose you had a device with the ability to temporarily give your ship tachyonic properties. Would this allow for FTL? How would it affect warfare in a sci fi universe? The reason I am asking this ...
2
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2answers
697 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), ...
3
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3answers
177 views

If a civilization could build wormholes, what else could they build? [closed]

I'll start out by apologizing that my knowledge of physics is limited. But moving on. As I understand it, in order to make a wormhole you'd need an absurd amount of negative mass to keep the ...
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8answers
3k views

Is there a technological difference between going half light speed and near light speed?

Assuming a civilization has the capacity to build space vessels designed to travel from one solar system to another, what is the technological difference between traveling at 50% light speed and ...