Questions tagged [faster-than-light]

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

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3
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1answer
306 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
196 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
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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9answers
1k views

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 ...
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
560 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 ...
1
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6answers
427 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 ...
5
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5answers
919 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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10answers
10k views

If FTL travel was invented tomorrow, would it change society? [closed]

Problem Movies like Interstellar or Star Trek would like to depict the ability to travel between stars, at speeds faster than light, as a technology which would revolutionize society and our everyday ...
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9answers
1k views

Defeating this fleet [closed]

I was watching the series called: "Once Upon a Time... Space" (I could only find the hungarian dub, which is my native language), that I want to make a fanfic about, and I ran into a problem.... The ...
4
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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
484 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 ...
29
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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 ...
1
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4answers
494 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 ...
2
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2answers
577 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 ...
43
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12answers
7k views

Does knowing a technology exists make it develop faster? [duplicate]

Let's say aliens arrive on Earth and demonstrate that Fusion is possible and leave (and don't tell us how). Would we develop Fusion technology faster without being told about how it works by the ...
17
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17answers
5k views

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 ...
9
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2answers
499 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?
1
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1answer
200 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
5k 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 ...
6
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5answers
586 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 ...
42
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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 ...
4
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4answers
321 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 ...
1
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1answer
276 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 ...
2
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5answers
558 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
155 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 ...
2
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1answer
204 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 ...
3
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5answers
648 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?
4
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3answers
953 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 ...
4
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6answers
526 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 ...
11
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6answers
3k views

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 ...
8
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1answer
1k views

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 ...
0
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1answer
350 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 ...
9
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7answers
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 ...
13
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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 ...
62
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9answers
8k views

Are there any ways to allow some form of FTL travel without allowing time travel?

Faster than light travel is a really cool thing to have in sci-fi settings. It allows humans, in relatable time scales, to travel the galaxy and see a variety of worlds. It allows for conflicts ...
17
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13answers
3k views

Science-based FTL drive

So I'm writing a story about a crew of scientists that explore the universe searching for a hidden knowledge in embed in the fabric of the space itself. More like to the Destiny's crew from Stargate ...
5
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6answers
2k views

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. ...
2
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4answers
500 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 ...
-1
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1answer
144 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
15k 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 ...
29
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14answers
7k views

Would 'cheap' FTL make powerful telescopes obsolete?

Imagine we have a faster-than-light drive which costs ~$250,000 USD per drive and can propel an ISS-sized craft at 1000 times the speed of light. It is reliable and has safeguards that stop it from ...
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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 ...
9
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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 ...
10
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4answers
3k views

How would FTL travel appear through window of ship?

How would faster-than-light travel appear through window of a space vessel? All the movies and TV shows like Star Trek and Star Wars seem unrealistic: Star Trek credits: passing stars get bigger and ...
2
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1answer
324 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 ...
5
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2answers
156 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 ...
2
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2answers
258 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 ...
5
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7answers
716 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 ...
10
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8answers
2k views

How could an multi-world economy exist if FTL communication, but not travel, existed?

Imagine that we one day invent an ansible, capable of near-instantaneous FTL communication, but we can not transport physical matter any faster than light. Imagine also that we have gotten to the ...