Wormhole Definition and 113 Threads

A classic topic, however I am new to the physics realm and i would like some help into understanding it. I have just finished reading "An Elegant Universe" by Brian Greene "Six Easy Pieces" by Richard Feynman "A History Of Nearly Everything" by Bill Bryson. And across these books i could not...

Questions about black holes: Various articles mention that it takes infinite amount of time to observe something pass through the event horizon. Does this imply that the redshift observed from afar would carry on forever, that the infalling object would just become dimmer and dimmer, but never...

Hello. In the movie Interstellar with Matthew McConaughey, there is a scene where wormholes are being explained. The characters say that the wormhole passage is a passage way through 5 dimensional space. Also when they are going through the wormhole they say they are passing through the bulk...

I'm working on a potential sci-fi story that takes place on a post-apocalyptic Earth. The idea is Something Horrible 1A happens, then, 15-20 years later, Something Horrible 1B comes to finish us off. In a perfect world, the Moon is gone after 1A. Initial possibilities included a long orbit...

Wormholes usually send things through time and space, right? So if an observer threw a baseball through a wormhole, the baseball's position in space-time would change. However, can that action affect the observer's location in space and time, or would it create some sort of paradox?

Still reading Kip Thorne's book on Interstellar. It, like so many other books that describe wormholes, shows a schematic of a wormhole like this: It's easy to intuit that the path through the wormhole is much shorter than the path through "normal" space. But that's because they're drawn it...

Thought experiment; You entangle a pair of particles. a chrono-naught takes one half of the pair and gets into Eisenstein's train, which now encircles the earth, and is then accelerated to .999 the speed of light and continues around the Earth for a million years or so. the other half of the...

I've recently come across the claim that if the mouths of a hypothetic wormhole don't move in relation to each other, then paradoxes in the form of closed timelike curves cannot be demonstrated to occur, even if an observer moves at relativistic speed relative to them. Is this true? I want to...

I've seen many sci-fi that they said wormhole could be detected by its gravitational wave ? Does wormhole actually create gravitational wave ? And how could a pair of black hole spinning around each other create such thing as gravity wave ? I am sorry for lacking knowledge about general relativity.

I'm writing a story and the general idea is about a city that vanishes from the Earth because a wormhole spawned on Earth in that exact location. It is moved not to another area in space, but to an entirely different spacetime. The wormhole in question only stayed open for a few seconds before...

According to Wikipedia's "Wormhole" essay, this is a metric for a traversable wormhole : ds^2 = -c^2 dt^2 + dl^2 + (k^2 + l^2)(d \theta ^2 + sin ^2 \theta d \phi ^2) If we assume the Einstein relation R_{uv} - \frac {1}{2} R g_{uv} = \frac {8 \pi G}{c^4} T_{uv} what kind of distribution of...

First of all, the metric I am referring to is this one: ds2= -c2dt2 + dl2 + (k2 + l2)(dᶿ2 + sin2(ᶿ)dø2) where k is the radius of the throat of the wormhole. (sorry for the small Greek letters) Now I have two questions about this solution to Einstein's equations: 1. What does the coordinate l...

Creation of Wormhole during entanglement Does entanglement work via a wormhole (in space-time)? How does time emerge from entanglement via comparison of an entangled state with a non-entangled one?

Hi, two questions A) If a black hole travels into a wormhole would it collapse the wormhole? B) If a wormhole travels through another wormhole what would happen? Thanks for any help.

I have always read that a wormhole will quickly collapse in on itself due to its own gravity, forming a black hole, unless it is held open by some exotic matter that has a negative energy density. But couldn't there exist a wormhole with zero spacetime curvature? It would therefore have no...

I've been reading the excellent article from Morris and Thorne: "Wormholes in spacetime and their use for interstellar travel a tool for teaching general relativity" and there's something I don't quite get it. In the ninth page the authors state: "[...] in the general case, the radial coordinate...

How do we know which one is a black hole solution(metric) or a wormhole solution(metric)? what is its feature?

Hello every one, some days ago, i was talking with some friends and we found a weird trouble that we can't explain so i wanted to ask it cause the curiosity its killing me... well the trouble its this: Suppose you are standing in the surface of a planet without atmosphere and you open a...

I saw this episode of Through the Wormhole With Morgan Freeman on Discovery Science recently and it was about how to increase human intelligence but the episode was almost finished by the time I tuned into the channel and the only thing I saw was the end of the explanation of a scientist who was...

A recent thread on Hacker News led me to this paper by Poplawski: http://arxiv.org/abs/0902.1994 The abstract says: "We consider the radial geodesic motion of a massive particle into a black hole in isotropic coordinates, which represents the exterior region of an Einstein-Rosen bridge...

This thread gave me an idea. What if a method of "FTL" travel, similar to wormhole would consist of a tunnel that had a physical distance "inside" that any signal would have to traverse, and that distance being equal to the time dilation between the mouths of the tunnel since its/their...

I'm working on a sci-fi / noir / mystery novel for my thesis, and I've endowed my femme fatale heroine with the ability to conjure traversable wormholes. It's important that she be able to do this without the aid of any machine or finite quantity of exotic matter that she would have to...

Hypothetically speaking of course, if we were to observe a galaxy billions of light years away on the opposite end of the universe through a wormhole, what would the red shift look like compared to other galaxies in the observable universe? For example, I'll set up a thought experiment. We...

I know it must be a little annoying to have someone ask for a simple explanation of something that isn't simple, but I've been trying to find out in various ways and nothing seems to explain exactly what a wormhole is. Sort of, not just how does it work but also how does it occur and what is it...

Need explanation on wormhole Hello frnds, i m new to this forum and having a interest in cosmology but short of knowledge. I have seen a documentary film on universe and space and came to know about wormhole, so i have following question on it- 1. From where concept of wormhole came? 2. Why...

Hi all I want to read more on wormhole theory and create speciality in wormhole theory . I am from engineering background, working in IT industry. so totally out of touch with physics and mathematics.Can anyone suggest some road map for me. How i can grasp the intricacies of wormhole theories.

Question about Brian Greene's wormhole illustration in "Fabirc of the Cosmos" I'm currently watching this show on NOVA narrated by Brian Greene called "The Fabric of the Cosmos". In the first episode, he talks about space and the fact that it has properties. In the second episode, he talks...

I was watching this show and it was talking about the usual stuff such as wormholes and warping spacetime but the one thing that caught my attention was towards the end. I can't remember the guy`s name but he was talking about observing spectral lines and how when he had looked in one direction...

Theoretically, a wormhole could be used to connect two points in space time and be stabilized using exotic negative matter for practical uses. My question is "how exactly (theoretically) would one actually go about connecting two completely different coordinates in space time? How do you...

I remember reading somewhere about how a wormhole let's you see yourself 10-30 years ago, I don't understand how that works. I knew they are a 'shortcut' through space time, but is it because your traveling a distance so large, but technically your just going through a much shorter distance...

How to embed a wormhole? http://www.physics.louisville.edu/wkomp/teaching/spring2006/589/final/wormholes.pdf" Please download the paper and then look at Fig. 1(b). I want to know, how we can construct such a wormhole. Would you please help find the metric describing the universe with...

I'm going to apologize now if what I say doesn't really make sense, I'm still only learning the basics of physics. Let's say that few hundred or maybe thousands of years, we developed some sort of device that can rip a hole into the space time fabric to create a wormhole. If a spaceship...

General Relativity can work up to 100 dimensions or more. Supposed Lisa Randall were right and there were extra large dimensions. Would it be easier to build wormhole between say New York and Europe so packages sent in futuristic Fedex would take instantaneously time to get transfered? It's...

Hello, I'm a liberal arts type with an interest in wormholes, so bear with my "science". From my readings, there are two (highly theoretically, of course) ways of creating a wormhole: 1. Focus a galactic-level beam of energy/mass at a single point. This will create a naked singularity...

I just wanted to know what exactly is a wormhole...

What is the difference between a black hole and a wormhole ?

On 12.April 2000, BBC news http://news.bbc.co.uk/2/hi/science/nature/710812.stm, quoting an article in New Scientist (to which I don’t have access, and which is anyway usually sketchy on details), wrote that Sergei Krasnikov of the Pulkovo Observatory in St. Petersburg has found a way...

Let us say there is a wormhole of the Einstein-Rosen type (maybe physically impossible, I know, but just assume somehow it exists). A 'rain observer' falls from rest at a large distance into the black hole, then emerges from the white hole on the other side. My question is, what is the...

Garrett's own critique of the show and himself http://www.math.columbia.edu/~woit/wordpress/?p=2990": Rhody...

I have a question about what happens if: A collapsing star (with an appropriate mass <20solar masses) forms a "donut" shape as it collapses. (first, is that possible?) and would it generate a wormhole traveling through the "donuts" center? The only thing that causes me to believe it would is...

I wonder what would various exotic objects in general relativity look like, alone and with things around them, for example a traversable wormhole. To that end, I'm trying to make a raytracer-like renderer for curved space. The problem is, i have vague idea what to expect. So, are there any...

I have a question wormholes. I know the loretzian wormholehas a black hole and the theoretical white hole. The Euclidean wormhole I don't know anything about. All I know is that they are from quantum mechanics. Can I have a non mathematical answer to what they are? Thanks!

probably a dumb question but could a comet or asteroid impact ever create a mini wormhole or mini black hole or the like? also what's worse in terms of impact damage? - a comet, asteroid or meteor? thanks

Hey Have heard that if you go trough a wormhole, you go to another place in space. You will also go to another time in space. Why is it that you go to another time, when you get to the other side of a wormhole? Is it because when entering it, you will be in one place in the river of time, and...

I've been reading about the possibility of time travel by accelerating one end of the wormhole and then returning it to its original position giving you a wormhole with an entrance in the present and exit in the past. If time travel using wormholes as described above is possible, can anyone...

Suppose a wormhole time machine is made by moving one mouth close to speed of light for a suitable time. Further suppose that immediately after the time machine is first completed, we have the following: Time at Mouth 'A' ---> 2010 Time at Mouth 'B' ---> 2000 Now if 20 years go by, would...

In Kip Thorne's popularization "Einstein's Outrageous Legacy", the author explains why a wormhole which has been arranged to connect two points in spacetime so that they are spatially close to one another but not the same time would find vacuum energy entering the "future" mouth, exiting out the...

[Checklist: FAQ and "read before posting" posts read...] It is said that the mouths of a wormhole can have mass or charge; I can't follow the arguments used to support this conclusion and would be very grateful if anyone could help clarify the issue for me. In fact, not to put too fine a...

what is the difference between black hole and worm hole

Hey everyone, I was just wondering if anyone could clear a few issues I'm having with black holes and wormholes. First, for an object above a black hole, wouldn't its gravitational potential energy be infinite, since it is above an object with infinite gravity, then causing another object...