Questions tagged [spacetime-dimensions]
For questions concerning dimensions of space and time, whether our 3-space + 1-time or other dimensions.
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The subjective experience of 2 time dimensions? [closed]
I saw a question about having 2 dimensions of time, and while the mathematics of it were interesting, I was wondering what some possible answers for the human, subjective experience of 2d time might ...
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Walk-in warp bubble: can it be done?
My setting has alcubierre-drive-style technologies using negative energy to create buildings that can be larger on the inside than the outside container area.
I’ve heard of Van de Broeck warp drive ...
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What does an intersection between two universes look like?
In this scenario, two universes intersect. During the intersection, they do not bounce off of each other. Instead, they pass through each other and intersect. What would the intersection look like? ...
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An avatar from birth
In my 'world', there is the three-dimensional 'real world', and the four-dimensional 'realm of the gods'. The 'real world' is much like a magical version of our own world, while the realm of the gods ...
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Speed of light in higher-dimensional space [closed]
In science fiction, one of the widely used tricks for achieving faster-than-light motion is traveling through "hyperspace". By that I mean, entering a space with more than 3 spatial ...
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How could a hyperspace "ocean" work?
I've been working on a mostly hard sci-fi setting where there exists an extradimensional hyperspace that allows for superluminal travel and time travel called Deepspace or Darkspace, which has a very ...
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Why are extra-dimensional monsters harmed by electricity but not physical blows? [closed]
Setting is based heavily on the works of HP Lovecraft, set in a world where mankind has to contend with extradimensional monsters known as Horrors.
The Horrors vary in ability and physiology, but a ...
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Could three-dimensional beings engineer a multi-dimensional structure?
Consider the bigger-on-the-inside concept of sci-fi staples like the TARDIS from Doctor Who. A generally accepted explanation for how a space’s interior could be larger than its exterior shape and “...
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This teleporter causes gravitational warping of the user’s body—how come it doesn’t kill them?
So I’ve got a nice point-A-to-point-B teleporter machine, and for some extra flavor I’d like to have the experience of using it include a healthy dose of gravitational/physical warping to push, pull, ...
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Light effects when facing a wormhole with faster time flow on the other side
Simply put, let's say there is a portal that leads to the past, and that it's "catching up" : an observator from the present looking into the past sees time go faster, and an observator in ...
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Would lenses work in a universe with four spatial dimensions?
Let us assume that we have a universe with four spatial dimensions rather than the three of our universe, in which matter can exist that is a four-dimensional analogue of three-dimensional matter.
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In a universe with loop dimensions how is the density of a massive body calculated? [closed]
In ordinary 3D space one can calculate the density (average density) of a massive body by dividing the mass of that body by the volume it inhabits
D = M/V with M in say kg and V in say m^3 so D = [kg/...
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How can I make the rules of my Faerie Portal free from contradiction?
On the hilltop in the field near my house, there lives a coven of witches. Or, more accurately, there is a coven of witches living in a pocket of the Faerie Realm which has recently become attached to ...
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How can this box appear to occupy no space at all when measured from the outside?
In my story, there is a 10 meter wide room with a 'special box' in the middle. The box is represented in the picture with the blue outline.
The box is 2.5 meters wide. So when you measure from the ...
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Theoretically, would anti-gravity have a temporal component and if so what would that be? [closed]
This is purely speculative since we don’t know if we can actually create anti-gravity. Gravity and Time are two of the biggest mysteries in our universe. We don’t know why gravity is so weak or where ...
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Teleportation without loss of consciousness
Trying to figure out a method for a teleportation machine that definitely does NOT "kill" the user in any way. The big thing is preventing a loss of consciousness during the process. Even if ...
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Would the dimensions of hyperspace be the 4th, 5th, and 6th spatial dimensions? [closed]
The dimensions of our world are X, Y, and Z; while the dimensions of hyperspace are X’, Y’, and Z’. So, the extra dimensional theories all state that the extra dimensions are inside of the observable ...
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Steering Alcubierre bubble?
So the question is - let's pretend we managed problems with exotic matter and/or energy (there are theoretical solutions without exotic matter, with only positive energy https://iopscience.iop.org/...
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Does my concept for an "ergosphere highway" make scientific sense?
In my current science-based project, I have this idea for a string of rotating black holes (bonus points if you can figure out how they can be lined up without gravitating towards each other) that are ...
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Is there a good geometric analogy for a 'trap' dimension that you can stumble into easily but is very hard to exit?
I have a magical children’s fantasy land, which is bordered by mountains on its northern side. I want to make it so that anyone travelling too far north is likely to enter one of many trap pocket ...
user86462
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Viewing the whole timeline from another temporal axis; why can't the first temporal dimension look back and see the future of the time travellers?
Introduction
A common image in time travel stories is an image of all time, either as a line or a tree form. Take this image from Loki as an example:
So a time traveller's organisation, like the one ...
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Celestial navigation in a 4D universe
4D objects can rotate in two independent planes simultaneously, giving them 2 equators (great circles where the planes of rotation intersect the surface) and no poles.
Both equators are objectively ...
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How is it possible that some extra-dimensional pouches can store living things while others can't? [closed]
The extra-dimensional pouch is a portable and lightweight container that is capable of storing almost unlimited tangible objects of any sizes inside a pocket dimension, but why might certain extra ...
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How would a radar work while inside a FTL dimension?
In my universe FTL drives are easily mass manufactured and most citizens own them and use them.
The FTL drives work by compressing a certain powder which then explodes, ripping open a wormhole which ...
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Creatures which can be mortal in one dimension and immortal in another dimension, How do I avoid time freezing forever?
These beings can live a normal life, except they switch dimensions, their body still remains in the same place. But almost as if time froze, they are transported in another world, an infinite ...
user89947
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Would an inter-dimensional being need to eat? [closed]
Would a being that could enter any space in any time, assume any shape, need sustenance or a source of energy to stay alive or does their very existence as inter-dimensional beings imply that they are ...
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How do Time Keepers log their diaries?
Set in distant future, a group of super advance civilization formed a special task force to observe and guard timelines, and they are called Time Keepers.
The Time Keepers will scan for spacetime ...
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How can the number of inconsistencies within a universe increase with successive patches?
Gods are all powerful beings who are eternal and have existed within the past, present, and future of a universe's timeline. However, every god also had a beginning. These beings were once mortals who ...
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What tests might someone do to assess possible brain damage from time travel? [closed]
I have a character who travels in time, but after making major jumps (like 100 years forward), she begins experiencing side effects—first nose bleeds, but the symptoms begin to increase to things like ...
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Nesting abilities of migratory interdimensional creature
I'm waving hands a fair bit here, and I am doing that because I believe that it is internally coherent, so if you accept these things, you shouldn't need the story to suggest answers. I'm including as ...
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How could 4th Dimensional "pockets" of space form in a 3D world, and how would 3D objects entering and exiting this space appear to observers?
I was inspired by a story that describes an event where many people die on a large industrial ship, and the 'cover up' story stated that the ship entered the 4th dimension, and when the ship appeared ...
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Can my 3-Dimensional-Space character orbit around a 4-Dimensional-Space planet?
The setting is as follows: a 3-Dimensional-Space(3-DS) character/Spaceship has entered the 4-DS and has encountered a planet (from far away).
Now he wants to orbit around it, but the planet is a 4-DS ...
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How can I implement time travel on a somewhat realistic way?
Requirements for answer:
-hypothetically can work (I don’t care if it’s hard or energy expansive)
Made by Mankind
Can be used at any time
preferably works for going to the past
it’s enough if I ...
user84509
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Using transfinite numbers in a scifi story
I have been bandying about some exotic mathematics ideas as the basis for a hard scifi setting, and I wonder what technology/alien life would "make sense," here, given the physics arising ...
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In fictional world with two time dimensions could I still keep laws of thermodynamics as they are in modern physics? [closed]
There was this question about spacetime with two time dimensions here, but I wonder what could that mean particularly for thermodynamics?
To be more precise, could such a universe (none of dimensions ...
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Why would a five dimensional creature need memories?
We human lives in a four dimensional universe: three spatial dimensions and one dimension for time. We feel the flow of time as experiential due to the fact that our brain saves past experiences into ...
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Existence of elementary particles in an hysteretic space-time
I am toying for a while with the idea of an hysteretic space-time.
Hysteresis is the dependence of the state of a system on its history.
Though it could make for some interesting twists in the world,...
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Effect of opening up a hyperspace portal on a planet surface? [closed]
Let's say we know how to enter hyperspace. Someone decides it's a good idea to open a "portal" into hyperspace on the planet surface. (I'm assuming this would take a fair amount of energy?)
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Should I allow my teleporter to maintain his momentum after a teleport? [closed]
So I've designed a si-fi rpg with my friends that uses a mixture of magic and tech. One of my players is magically a teleporter and wants to know if his teleports would maintain his current velocity ...
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A Semi-Complex, yet fictional explanation for the possibility of portals or wormholes
I am working on a Young Adult fictional story that is based upon the ability for humans to travel through portals. I have done a little research about portals, an idea that has always been interesting ...
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Superpowers of a 5-Dimensional Being [closed]
So, I have seen the superpowers of a 4-Dimensional Being pop up a few times on this site. However, I will instead talk about the powers of a being with one extra dimension, making them a 5-Dimensional ...
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Is it possible to make up a self consistent quantum gravity for a fictional universe?
I understand that for real world physics the current Theory of Quantum Mechanics, and current Theory of General Relativity are incompatible. I'm thinking about how one thing different about ...
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How would a higher-dimensional being enter a lower dimension?
So I could not get any answers for my previous question regarding what happens in a indeterministic world such as the worlds in a Cauchy Horizon of a Reissner Nördstrom Black Hole.
However, I ...
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What can happen in a non-deterministic world? [closed]
I was reading about a theoretical charged Black Hole known as the Reissner Nördstrom Black Hole, where should someone enter its Cauchy Horizon, will end up in a world not bound by determinism. What ...
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Could aliens from beyond the singularity of a rotating black hole survive and colonise regions of a normal universe?
Would it be possible for aliens that originated and evolved in a planetary system beyond the ring singularity of a rotating black hole to send individuals out into a normal universe to colonise it? Or ...
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Is three-dimensional time consistent and paradox-free for time/dimension travelers?
This question was edited based on answers already submitted. I am designing a universe with both time travel and alternate realities, but I don't want the whole thing resting on hand-waving and ...
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How would wormholes and teleportation affect the passage of time?
Time is not a constant, Albert Einstein proved that much. Time dilation is a difference in the elapsed time measured by two clocks, either due to them having a velocity relative to each other, or by ...
user71341
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Formula for send and response times of messages at fraction of light speed?
I have a ship that begins the equation traveling at 50 percent the speed of light, but decelerating constantly to finally land on a certain planet (towards which it is moving the entire time). It ...
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Message sent to a ship traveling away at 37.5% light speed? [closed]
I have a ship traveling away from Earth at around 37.5 percent of light speed. How long will a message take to reach first Earth, and then a response to reach the ship, both from Earth perspective and ...
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What would a two-dimensional world look like?
As we know our real world is (if we ignore extreme physical theories) three-dimensional.
I wonder what a two-dimensional world would look like and if live would be possible. In my opinion many ...
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