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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1answer
304 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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2answers
147 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
166 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 ...
14
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1answer
2k views

What would be the effects of traveling faster than light on a worldship?

Assuming a civilization has the technology and capability to build a worldship, a planet that doubles as a spacecraft, installs an FTL drive on it and has the energy to power it, what would the ...
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3answers
2k views

How does paradox-free FTL travel affect the details of my story or gameplay?

It is understood that a way to prevent causality violation and time-travel while still having faster-than-light travel is to introduce a specific reference frame. This is explained in detail in this ...
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10answers
7k 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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19answers
5k views

Why are interstellar colonists lone rangers?

The time is The Future. Humanity is spreading throughout the stars, aided by the invention of Schwarzschild gates. The gates allow for FTL travel by tearing open wormholes in space. There are three ...
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0answers
99 views

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 ...
2
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2answers
292 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 ...
3
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1answer
315 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 ...
3
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1answer
285 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 ...
4
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5answers
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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 ...
-1
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1answer
117 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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10answers
2k views

Interstellar communcation with FTL

I am designing a world where humans have achieved FTL by means of the Alcubierre warp drive and are colonizing the stars. Originally I had communication pegged as being done with quantum entanglement ...
14
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7answers
4k 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 ...
3
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3answers
546 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 ...
5
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5answers
898 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
413 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 ...
9
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1answer
690 views

Life at faster than light

Tachyons are a hypothetical particle that constantly move at speeds in excess of the speed of light. We haven't yet proven their existence, but neither have we disproved their existence (which is, as ...
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5answers
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How would advanced aliens protect themselves from idiots with FTL?

Faster than light travel is Dangerous with a capital D. The main reason for this is because by the time you see something, you've already smashed into it and vaporised yourself, the target and any ...
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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 ...
6
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4answers
472 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
464 views

Plausible hard science explanations to seemingly FTL communication [closed]

In my universe, FTL communication using entanglement SEEMS to have been achieved. I understand quite well from a layman's perspective how it's basically impossible without a complete overhaul of ...
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2answers
567 views

I have an FTL missile and it is causing paradoxes I don't want in my universe, what do I do? [duplicate]

This is something I have had going in my head that actually hurts to a strong extent as I just can't figure out what would be so great about having a FTL missile over a laser and a paradox that is ...
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17answers
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How to Protect Against FTL Sneak Attacks

Background: Following the development of faster-than-light technology, humanity has spread across the stars and encountered many kinds of alien life. While the galaxy is mostly peaceful, occasional ...
8
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2answers
480 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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19answers
9k views

Standardisation of Time in a FTL Universe

Here on Earth, time standardisation was enabled by the invention of accurate time pieces which allowed us to create a global constant (GMT/Zulu time) and regional offsets. If we travel outside our ...
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1answer
193 views

FTL and causality [duplicate]

Let's assume that a method for FTL has been found, and for whatever reason, it work. Given our current knowledge of physics, what would be the consequences? For example, under what circumstances ...
34
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19answers
4k views

Which current networking protocol would be the optimal choice for very small FTL bandwidth?

Possibly a dumb and outsider question, but my knowledge in the basics of computer networks is terrible. Imagine the possibly not too original concept, that humanity somehow manages to transmit data ...
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5answers
571 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 ...
4
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3answers
938 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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4answers
317 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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1answer
264 views

Ouroboros Wormhole

So let's say that some advanced future civilization is capable of creating and manipulating wormholes, and uses a network of wormholes for their FTL transportation. If an enemy gets too close to one ...
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5answers
552 views

Travel (how far?) into the future using a black hole and light-speed space craft?

A person is traveling in a space craft that was designed and built by sufficiently advanced aliens. This space craft left from Earth and is capable of traveling infinitely close to the speed of light. ...
2
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1answer
179 views

STL Warp usage for transportation around a planet?

Assuming the Alcubierre drive can be made to work, there are issues with it, like the creation of black holes and white holes in front of/behind the ship. There is also the having to be on tracks ...
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1answer
149 views

What are multiple scientificly plausible methods of faster then light travel [closed]

I'm trying to figure out several methods of FTL, that are actually theoretically possible. ALSO, What would be a viable method of high-speed travel, particularly in a Dyson-sphere (Well, A chunk of ...
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5answers
646 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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6answers
522 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
1k views

When could space travel (including FTL of any kind) and other tech be common?

I'm looking for some data to create my own sci-fi setting, but I want to base it on real world as much as possible. Also, I don't want to come up with any arbitrary year like 3290 with no background ...
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6answers
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Mapping the far side of the galaxy

Humans got a one time ticket to the other side of the galaxy, traveling $2r$ in just a few days (where $r$ is the distance from earth to the super massive black hole: 28,000 lightyears) The stars we ...
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1answer
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What would define the “speed” (and direction?) of an alcubierre like warp drive?

There seem to be honest scientific exploration in the field of the alcubierre warp drive if you believe some articles on the net. So to be a little bit scientific accurate in a story using it, I ...
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1answer
331 views

Energy requirement for ftl [closed]

What would be a fair energy requirement (in Watts) for a hyperspace engine to support 1T at 1c? This is how the system works: Gravity affects your ship, so you have to compensate for that (or take ...
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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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4answers
499 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 ...
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1answer
142 views

Impact of FTL on Humanity & discovering new intelligent life [closed]

Let's say Humanity develops FTL in the next 25 years, something along the lines of the Alcubierre Drive humanity in 2041 still has quarrels amongst themselves. Our first exploration vessel is ...
52
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11answers
14k views

If an FTL spacecraft entered Earth orbit, how long would it take for humans to build a FTL spacecraft?

It’s just another average day in the life of modern day earth. Suddenly a transmission from orbit washes over the planet! Oh no! An alien race, calling themselves the “Thull”, has suddenly arrived in ...
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1answer
2k views

What would a ship with an Alcubierre Drive look like?

I am designing a video game in which Alcubierre Drives will be obtainable by the player. I would like this game to be somewhat scientifically accurate in this way. Specifically, I am interested in ...
9
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6answers
1k views

hypothetical criteria for non-paradox FTL

Many sci-fi questions here are derailed by complaints that the proposed version of FTL breaks causality. However, relativity-safe FTL concepts do exist. What range of conditions allow FTL (movement, ...
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13answers
3k views

Space Mechs or Tanks or Planes or Marines - Fighting in space without blowing up each other's starships

Suppose that there are 2 interstellar empires at war with one another, both armed with FTL drives which cannot be used within a certain radius of huge gravity fields, stars, gas giants, etc. Another ...
2
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1answer
319 views

How would something faster than light be affected by a black hole?

What would happen if something (having mass) existed which has a greater speed than that of light? How would it be affected by the black hole when it, say, speeds past a black hole? Would it ...