These days, Hua Feng's mind is full of imagination of "wormholes", and even thinks of some possibilities of time travel.

"Wormhole" is a concept that appears in the general theory of relativity, referring to a peculiar celestial body in the universe. Although there is no experimental evidence that wormholes actually exist, scientists predict that they exist in the form of shortcuts between space-time endpoints, imagining that wormholes connect empty regions of space. However, a recent study suggests that wormholes may exist among distant stars. They are not space-time tunnels, and wormholes contain near-perfect fluids that can flow back and forth between two stars, a fluid feature that may be a sign of the existence of wormholes.

This latest research has led scientists to question whether wormholes may exist in different ordinary stars and neutron stars. For example: normal stars and neutron stars. But they may have some differential features that can be detected. To investigate these differential features, the researchers designed a model with a channel in the center of an ordinary star through which cosmic matter could travel. Two stars sharing a wormhole together will have a unique connectivity, which is due to the fact that the wormhole has two channel openings.

Because the strange matter in the wormhole can flow like a liquid between stars, the two stars will have an unusual pulsation pattern, which will release different types of energy, such as super energy.

There are two types of wormholes proposed by scientists, one for interstellar and intergalactic travel in the universe in which we live, and one for traveling between different universes

The wormhole is a magical tunnel where you can travel through time and space, making interstellar or even intergalactic travel no longer a dream. Scientists believe that wormholes are extremely unstable, and if there is no strange substance with negative energy to keep the hole open, the wormhole will suddenly close in an instant. However, according to studies conducted by German and Greek physicists, wormholes can be opened without the help of this exotic substance. This finding means that humans may one day discover wormholes in space. Perhaps, a civilization far more advanced than humans has used an intergalactic subway system composed of wormholes to travel between different galaxies.

Is a wormhole a time machine? or can connect two different planes:

Astrophysicists believe that wormholes are a natural time machine, and keeping them open allows us to go back in time or into the future, although there is no evidence that there are "macroscopic wormholes" in the universe.

We are only studying this peculiar space-time based on Einstein's predictions of general relativity. Time machines only appear in science fiction films, and it is almost impossible for events to go in the direction of the arrow of time, but Einstein's theory of space-time allows time travel, and some specific space-time predicted in the theory of relativity can turn time backwards, connecting two distant spaces together through space-time bending, making travel in three-dimensional space very fast, and the journey of tens of thousands of light-years will be greatly compressed.

Astrophysicist Eric Davis thinks that if we can keep a wormhole open continuously, we can go back in time or enter the future world, but where is the wormhole? We have not found evidence that the wormhole exists in the real universe, and if the wormhole does exist, then it may not even fit a person, let alone a spaceship. In response, physicists have come up with a theory known as a "closed time-like curve", suggesting that time machines can be fabricated. The use of wormholes to travel through time and space can meet the requirements of the upper limit of the speed of light, and the faster-than-light operation is actually the result of space-time distortion, and the effect of faster-than-light is achieved by highly distorting space-time.

According to scientists, maintaining the continuous opening of a wormhole requires a large number of "exotic foreign matter", which we know little about, which will involve quantum theory, and which cannot be explained by general relativity. Astrophysicist Robert Owen believes that when an object enters a wormhole in an attempt to time travel, it has a variety of laws of physics that limit its work, and it seems that some mechanism in nature closes the wormhole. According to quantum theory, maintaining a wormhole's time machine can lead to a large amount of energy gathering that will eventually "destroy" the wormhole, so we must complete time travel before the wormhole closesBefore studying the wormhole, scientists need to spend time dealing with the problem between general relativity and quantum theory, and the new theory will serve as the basis for time travel,

5. Relevant theories are edited

There are several ways to say wormholes:

One is the tunnel in space, which is like a sphere, and if you walk along the sphere, you can go far. But if you walk the diameter of the ball, it is close, and the wormhole is the diameter!

The second is the connection between black holes and white holes. A black hole can create a potential well, and a white hole can create an antipotential well. The universe is three-dimensional, and if the potential well is regarded as the fourth dimension, then the wormhole is the fifth dimension that connects the potential well and the antipotential well. If you draw an image of the universe, potential wells, antipotential wells, and wormholes, it is like a Klein bottle - the mouth of the bottle is a black hole, the junction between the bottle and the bottleneck is a white hole, and the bottleneck is a wormhole!

The third is the time tunnel you said, according to Einstein you can do time travel, but you can only watch, like watching a movie, but you can't change what happened, because time is linear, the events are the beads that have been worn, you can't change the beads and you can't move the order!

Fourth, the surrounding force is subjected to a fixed way, resulting in the huge thrust caused by the force space handling. For example, a vacuum in water is suddenly filled with water in a certain shape, and the pressure caused by the huge water pressure pushes the contents out of it. Perhaps this can be achieved by borrowing the forces possessed in nature, just as it can generate electricity by the power of water, but with another turning around.

We're talking about ordinary "perfect" black holes. In detail, the black holes we discussed do not rotate and have no charge. If we consider that a black hole rotates at the same time and/or has an electric charge, things get more complicated. In particular, it is possible for you to jump into such a black hole without hitting the singularity. As a result, a rotating or charged black hole is connected to a corresponding white hole, and you can jump into and out of the white hole. Such a combination of a black hole and a white hole is called a wormhole!

It is possible that the white hole is very far away from the black hole, and in fact it may even be in a "different universe" - that is, a region of space-time that is completely unconnected to our region except for the wormhole itself. A conveniently located wormhole will give us a convenient and quick way to travel long distances, or even to another universe. Maybe the exit of the wormhole stops in the past, so you can travel back in time through it. Overall, they sound pretty cool.

But before you decide that theory is correct and you are going to look for them, there are two things you should know. First of all, wormholes are almost non-existent. As we mentioned above about white holes, just because they are valid mathematical solutions to a system of equations does not indicate that they exist in nature. In particular, when a black hole is formed by the collapse of ordinary matter (including all black holes we think exists), wormholes do not form. If you fall into one of them, you won't jump out of nowhere. You'll hit the singularity, and that's the only place you can go!

Also, even if a wormhole is formed, it is considered unstable. Even a small disturbance (including the one you try to pass through) can cause it to collapse.

After Schwarzschild discovered Schwarzschild black holes, theoretical physicists explored the Schwarzschild solution of Einstein's constant equation for almost half a century. Including the above-mentioned Kerr solution, Resler-Norsrum solution, and later Newman solution, all of which are the results of research around Schwarzschild's solution. The wormhole that I will introduce to you here is also a descendant of Schwarzschild.

When physicists thought of white holes, wormholes first appeared in Schwarzschild solutions. Through an Einstein thought experiment, physicists discovered that space-time can be curved. In this case, we will be surprised to find that if a star forms a black hole, then space-time is completely perpendicular to the original space-time in the Schwarzschild radius, or the event horizon.

Ever since the discovery of wormholes in Schwarzschild solutions, physicists have become curious about the nature of wormholes!

Let's first look at the classic function of a wormhole: connecting a black hole and a white hole to become an Einstein-Rosen bridge, which completely disintegrates matter into elementary particles at the singularity of the black hole, and then is transported to the location of the white hole through this wormhole (i.e., the Einstein-Rosen bridge) and is radiated out.

The wormhole has no horizon, it only has a disintegration surface with the outside world. The wormhole is connected to hyperspace through this decomposition plane, but here the curvature of space-time is not infinite. Just as a curve tangent to another curve in a plane, in the wormhole problem, it is like a four-dimensional pipe tangent to a three-dimensional space, where the curvature of space-time is not infinite. So we can safely pass through the wormhole without being destroyed by the huge gravitational pull.

Astrophysicists believe that wormholes are a natural time machine, and keeping wormholes open can allow you to go back in time or into the future.

Astrophysicists say that wormholes may be a natural time machine, although the act of transcending wormholes has never been seen, and there is no direct evidence that the wormholes themselves are real, but this strange space-time has been studied according to Einstein's predictions of general relativity.

Astrophysicist Eric Davis believes that if a wormhole can be continuously opened, it can go back in time or enter the future world, but where is the wormhole? There is no evidence of the existence of wormholes in the real universe.

Little is known about the exotic alien matter, which will involve quantum theory, so time travel must be completed before the wormhole can be studied.