Questions tagged [faster-than-light]

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

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8
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3answers
347 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, ...
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2answers
439 views

What would happen if two spaceships with Alcubierre warp bubbles were colliding?

What would happen if two spaceships with Alcubierre warp bubbles were colliding? Would the space bubble collapse? Would they reject or push each other? Would they survive it without problems?
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1answer
275 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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5answers
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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 ...
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10answers
578 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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7answers
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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 ...
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6answers
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 ...
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5answers
406 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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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 ...
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4answers
447 views

Assuming Interstellar travel was feasible, what trade goods would in demand? [closed]

Assuming some kind of "warp gate" or "Space lane" that makes FTL travel between different stars feasible... What goods would be most likely to be traded? Especially, what would Earth want to import vs ...
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4answers
516 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 ...
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5answers
217 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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5answers
549 views

Consequences of Portal-Travel

I'm throwing around a rough concept in my head and wonder which effect it would have on the present world. How would the world as we know it change if this technology were invented (and nothing else ...
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2answers
376 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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7answers
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Can this version of the Alderson Drive be used to violate causality?

I'm working on a simulator-type game which I want to be at least internally consistent, and which I'd like to work as close to reality as possible. That being said, it's set in space, which means to ...
6
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1answer
290 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 ...
6
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2answers
263 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 ...
6
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2answers
321 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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6answers
528 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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5answers
165 views

Light-slowing Gas

Can we prepare a gas medium in which we can travel faster than light? This question struck me while reading a sci-fi where a scientist prepared such a gas medium. He sat in a chamber filled with that ...
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7answers
617 views

Jumping vs. FTL speeds: economic differences

At a crucial point in the development of human civilization, there is a split in the timeline: one where FTL travel is facilitated by jump-drives/wormholes, and another with superluminal speeds (Star ...
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5answers
857 views

If an immortal, fabricated particle could travel FTL, would it exist in all times, or only the past relative to its present?

This seemed too scifi or hypothetical for physics, so here goes. Suppose a manipulated quark with 0 mass could travel faster than the speed of light. It's known that the faster you go, the slower ...
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6answers
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galactic travel : an alternative to FTL

For a rather hard-science based sci-fi setting, I am checking for faster-than-light (FTL) possibilities. One option that I consider is the following: Interstellar travel is achieved through portals. ...
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3answers
249 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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8answers
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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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4answers
295 views

Break-even distance for sending data at c versus sending an FTL hard drive?

In the mid-21st century, humanity has an interplanetary colony system principally spanning the Moon, Mars, and Titan (as per usual). The furthest established colony is on Proxima b. Humans have FTL ...
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6answers
476 views

How can the entire universe be mapped?

Inspired by Mapping the far side of the galaxy, I wondered how it would be possible to create a real-time map of the entire universe. As that question dealt with the issue of a one-time travel to the ...
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5answers
188 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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3answers
883 views

How far can space time be warped, twisted, and pulled?

In the story I'm writing, an ancient civilization once roamed the local group, traveling from galaxy to galaxy with ease. Thousands of millennia after their disappearance, humanity stumbles across the ...
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2answers
134 views

Protocol between an information sharing black and white hole pair

Premise: Imagine a "sender" construct that has the ability to create it's own micro black hole and send information as light into it. On the receiving end, a "receiver" construct would contain it's ...
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2answers
1k views

Logically consistent FTL without time travel [duplicate]

If relativity holds, than faster-than-light travel would allow for time travel into the past. However, some claim that if all FTL travel used only one frame of reference, there could be no temporal ...
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0answers
215 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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3answers
410 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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3answers
421 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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4answers
219 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 ...
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5answers
645 views

How cheap would FTL have to get to be practical? [closed]

So I'm wondering, how cheap would ftl travel have to get to become practical for transporting people and establishing bases for civil and military use?
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3answers
307 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 ...
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3answers
248 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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3answers
181 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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2answers
104 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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5answers
350 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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1answer
241 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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3answers
514 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 ...
3
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1answer
290 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 ...
2
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5answers
395 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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2answers
709 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 ...
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3answers
160 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 ...
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3answers
213 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 ...
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4answers
481 views

Is moving faster than light speed a paradox? [closed]

Let's assume that somehow humanity invented a teleporting machine that could momentarily transport a person over very large distances (up to several light years). As we know, the speed of light is ...
2
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2answers
234 views

Could faster-than-light supernova remnants form a star system?

Most current planets, and any inhabitants living on them, are ultimately the product of long-dead supernovas that exploded and sent matter across the universe, where it eventually got caught with ...