Technology has changed the lives of mankind, and it is constantly changing the destiny of mankind. In the atmosphere of technology, human dreams are constantly changing. The dream of the ancients is to fly to the sky one day and travel to every corner of the earth. This dream has now been realized by mankind. We can not only travel to every corner of the earth, but also go out of the earth and explore the universe. space.
The dream of modern people is no longer limited to the earth, but hopes to be able to travel to every corner of the universe, and even some people hope that there will be days when human beings can travel through time and space and travel to the past and the future at will. After Einstein put forward the great theory of relativity, there are more and more topics about time and space travel, and many writers have written many novels that travel through time and space based on this theme.
So does time travel really exist? The theory of relativity has already told us the answer theoretically, and time travel is theoretically feasible. In particular, traveling to the future is more likely to be realized in the future, and scientists have also proposed 4 feasible methods, let’s take a look together below.
1. Use speed to travel to the future. Einstein’s theory of relativity tells us that the faster the speed of an object, the slower the time acting on the object. The speed of a mass object can only be infinitely close to the speed of light, and cannot reach or exceed the speed of light. Therefore, the speed of light of the object’s limit speed is only an unattainable goal, and the speed of our spacecraft can only achieve infinitely close to the speed of light. Even so, it can also allow us to easily travel to the future.
Someone may ask, since the faster the speed, the slower the time, is it possible that we can reach the future by taking an ordinary spacecraft and moving forward at a super fast speed? Of course, it is not that simple. Although the theory of relativity tells us that time can be distorted, the faster the speed of an object, the slower the time, but the general speed, no matter how fast it is, the slower time is very small. For example, when we take an aircraft like Voyager 1, its speed is tens of kilometers per second, which seems to be very fast, but even at this speed, even if it advances for a light-year, after returning to the earth, the earth does not have much time passed. It is impossible to truly realize the journey through the future.
To achieve an obvious time to travel through the future, the speed of the spacecraft needs to be infinitely close to the speed of light. According to the clock slow effect of special relativity, if the spacecraft flies at 99.9999999985% of the speed of light and returns for 1 day, the time on the earth will elapse 500 years. Based on 99.999999999996252% of the speed of light, the time on earth will pass 10,000 years.
It can be seen that only when the speed of the spacecraft reaches a level of 99% can it truly realize the journey through the future. The closer to the speed of light, the greater the time span of the journey. With the continuous advancement of human science and technology, sub-light speed flight can be achieved. Of course, it is necessary to achieve a flight speed of 99% light speed. At the speed of human technology development, it is not a short time to achieve.
2. Use gravitational waves to travel through the future. Einstein’s theory of relativity pointed out that mass objects will distort the surrounding space and time. In our eyes, the universe seems calm. If you magnify it many times, you will find the whole The universe is not peaceful, and there are distortions everywhere.
The distortion of time and space forms a circle of waves like ripples, and then radiates outwards, which are called “gravitational waves.” Gravitational waves are a kind of wave conjectured after Einstein proposed the theory of relativity. In 2016, scientists detected gravitational waves in the universe for the first time. Since then, gravitational waves have changed from conjecture to reality. Gravitational waves can change time and space. In theory, we can use gravitational waves to cross time and space.
I believe that many friends read science fiction. In these science fiction works, spacecraft can fly faster than light, and one of the primary ways to fly faster than light is to use gravitational waves to break through space and achieve space jumps. Space jump can allow the spacecraft to quickly reach the distant starry sky. This speed can theoretically change the time of space and space, so as to realize the future traversal.
3. Using wormholes to travel through the future, we all know that the universe is vast and vast. The current observable universe of mankind is 93 billion light-years away, and this range may be just the tip of the iceberg of the vast universe. The vastness of the entire universe is beyond our imagination. Scientists have speculated that the current universe may reach trillions of light-years, and the entire universe is still expanding at an accelerating rate.
Such a vast cosmic space, if it is only explored at the sub-light speed, it will naturally never be possible to explore it. The speed limit of an object is the speed of light. How do we explore the universe? At this time, Einstein also proposed the wormhole conjecture based on the theory of relativity.
Wormholes are equivalent to a space-time channel. In the work of a cause science spectrum, a piece of paper is used to explain wormholes. Holding a blank piece of paper in our hands, we can imagine the universe as a blank piece of paper. Then the two distant points on the white paper can never be reached under normal circumstances. So we can fold the paper in half. At this time, the two points at the two ends of the white paper are infinitely close.
At this time, we take a chopstick and cross these two points to achieve a connection. This chopstick can be seen as a wormhole connecting these two points. Through the wormhole of chopsticks, we can make the long distance very short, which can be achieved instantaneously. This is an application of using wormholes to span spatial distances. The wormhole is a channel opened under the extreme distortion of space. Since the extreme distortion of time and space, theoretically passing through the wormhole can also make time reach infinitely slow, thus crossing the long river of time to reach the future.
4. Traveling through the future through human freezing, the first three methods of traveling through the future are all realized on the basis of the theory of relativity. At present, they are just a kind of theoretical conjecture. Even if the time and space travel under the theory of relativity really exists, it will not happen overnight for human beings. It may take thousands of years, or tens of thousands of years or even longer.
Compared with the previous methods that we can only study theoretically, cryonics technology is a technology that has been able to achieve preliminary applications. I believe my friends all know that some animals will hibernate in winter. After hibernation, the metabolism of the animals will slow down a lot, which can save a lot of energy consumption and do not need to eat throughout the winter.
Cryonics technology is inspired by this, and scientists began to study and explore a method to greatly slow down the body’s functions. Scientists use freezing technology to physically cool the entire human body, so that all cells in the body enter a dormant state. At this time, the energy consumption of the human body will be greatly reduced, and even when the freezing technology develops to advanced levels, the energy consumption of the human body can be infinitely close. Stop.
When the cell activity in our body slows down significantly or even closes infinitely to a halt, time will be meaningless for freezing people. Even if thousands of years, tens of thousands of years or even longer have passed, as long as the defrosting is successfully achieved, then this People will come back to life and start a new life. This is an alternative way to travel through the future, and it is also the most promising way to travel in the visible time.
Time travel is theoretically feasible. Hawking was also very interested in time travel throughout his life. He also went through a lot of research and exploration, and also put forward his own views. Even on June 28, 2009, the famous “Future People Dinner” was held. It can be seen that Hawking is a stalwart of time travel, and he believes that time travel can be achieved. Of course, Hawking has also warned about this. If humans realize time travel in the future, it will naturally be no problem to travel to the future, but if it is to go back to the past, it may change history, which will produce a serious butterfly effect and give real time and space. Bring unpredictable terrible consequences.