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Questions tagged [faster-than-light]

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

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1answer
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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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22answers
12k 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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2answers
222 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
51 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
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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
236 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
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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
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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
7k views

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
178 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
225 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 ...
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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
183 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
229 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
412 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
186 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
5k 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 ...
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5answers
327 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 ...
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3answers
381 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 ...
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2answers
212 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
378 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
275 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 ...
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2answers
535 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), ...
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3answers
150 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 ...
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0answers
200 views

FTL by exploiting the frame rate of reality [closed]

I'm considering a possible method of FTL travel for my science fiction universe. I stumbled upon this Quora post which supported a concept that I had. Does it make sense to liken the inverse of ...
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1answer
218 views

“Feasible” Intergalactic Travel via Brane/Bulk

In attempting to come up with a semi-reasonable method of intergalactic travel, I ended up conceiving a general method of FTL travel relying on brane cosmology and the "bulk" being transversable in ...
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8answers
458 views

Using magnetic fields to prevent a weaponized warp drive?

I've been thinking of ways that an FTL-capable galaxy would prevent weaponized FTL missiles. Ignoring causality violations and paradoxes, I'm looking for a way to keep something based on an ...
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6answers
490 views

Signal language, how long can we stay in touch?

I'm working on a universe where FTL exists but arrival times can be unpredictable to say the least. On average FTL trips are conducted at 4C but ships can take much longer to arrive than that speed ...
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1answer
309 views

Interstellar Player - How to defend you realm under given circumstances? [closed]

Prefix interstellar travel In "my universe" the FTL technology of choice is the classic jump drive. A ftl capable craft moves from one jump point in one system to another jump point in another ...
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2answers
122 views

Quantum Entanglement or other means of FTL Travel

I am writing a Sci-fi/detective story and I'm wondering if Quantum Entanglement is a feasible means of FTL travel. (I know very little on the subject so if no is the answer please suggest a possible ...
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4answers
153 views

Would using Magnetic Coil Platforms be an effective way to transport people across Solar Systems

QUESTION So recently I was doing research on Magnetic Coil based weaponry in the Halo universe, and while reading about how the "Super Mac" worked, I noticed that the theoretical speeds at which the ...
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10answers
2k views

A mechanism for a level interstellar playing field

So, this is a trope common to any number of science fiction worlds: humanity emerges from its solar system to discover that there are a bunch of alien races out there, but, importantly, at least the ...
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9answers
571 views

Can industry work on a poor import schedule?

I've been working for some time on a universe in which there is limited FTL consisting of short (up to five light years at a time) jumps between points in space. The jumps take no time at all for ...
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1answer
243 views

What dangerous side effects might occur when using a bubble of spacetime to enter hyperspace? [closed]

I'm creating a fictional hyperspace to enable FTL travel. It's sort of a mix of Star Wars, Star Trek, Halo, and probably a bunch of other stuff. I've run into an aspect of it that either requires some ...
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10answers
6k views

Realistic 'hacks' that programmer may exploit in a brand new FTL comm system that was not securely written?

In my world one company has had a monopoly on FTL comms, making large beacons in each inhabited system. This company has worked to prevent knowledge that smaller FTL comms were possible, in order to ...
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29answers
11k views

What realistic way could limit an FTL drive to only travelling between stars?

How could a Faster than light drive be limited to only travelling between different solar systems, and not within a solar system? I don't really want to allow travel between planets in the same solar ...
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0answers
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A relatively relativity-safe FTL [duplicate]

Relativity is fun, but it does have some downsides. In practice, travelling near the speed of light makes you travel into the future, which is problematic. Relativity also doesn't seem to agree with ...
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2answers
251 views

How exactly would this chronology protection for my FTL drive look like?

The problem with FTL is that, due to the tachyonic antitelephone, it allows causality violation: I send you a superluminal message (you are moving away from me at relativistic speed), you reply with a ...
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1answer
257 views

Alcubierre drives and intrasystem speed limits

I am working on a world (see this question) which I currently plan to have FTL via Alcubierre warp drive. I want to avoid the possibility of FTL sneak attacks so I plan on having something that ...
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1answer
195 views

Can matter be super-compressed by a magnetic field

So I had this idea for an FTL drive that would work by creating a rift (a black hole before it tugs on space enough to become unstable and deadly) via an unbelievably strong magnetic field. I know ...
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5answers
180 views

I'm wondering what a teleporting ship would look like coming above earth's atmosphere

I'm creating a universe where ftl space travel is possible by folding space. You can only travel point to point with direct line of sight. The example I plan to give in the book, to clarify, is that ...
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1answer
109 views

Light speed comunications [closed]

Suppose that a ship is traveling from the earth, point A, to Pluto, point B. That travel is at speed of light, or close to it. They comunicate by radio or laser back to earth. Since the ship is at ...
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6answers
758 views

FTL in a relativistic universe. Am I avoiding the 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 ...
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7answers
3k views

How does a teleporter logically lead to time travel? [closed]

I've read a good number of FTL equals time travel questions and answers both here and on other sites, but for the life of me I just do not get the connection. Let's take a really simple case: say at ...
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3answers
424 views

Will This Violate Causality?

Okay, so I have a sci-fi setting in which there is a form of FTL travel. Imagine the universe(all three/four dimensions of it) was stretched out onto the surface of a sphere. Now assume that there ...
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6answers
357 views

If you're moving at a speed exponentially faster than the speed of light, can you still see each other? [closed]

My story is set in the future, where organisms have long since evolved to speeds beyond the speed of light. The only problem is that I can't quite work out how can they can see each other since light ...