Travel time in a scientific perspective

According to Albert Einstein's theory of relativity, people can travel time in certain conditions.

An American scientist proves that humans can fully travel to the future if they are equipped with all the necessary things, Space reported on September 1.

Time travel is possible according to Albert Einstein's theory of relativity.(Photo: Daily Express).

According to Einstein's special theory of relativity, the only three dimensions of time and dimension are closely related, said Paul Sutter, an astrophysicist at Ohio State University. People do not consider them discrete elements but a unified entity.

However, time seems a bit different. While people can completely move freely in space, we must always follow the flow of time. Time has only one movement from the past to the future.

Although it is impossible to resist the flow of time, humans can control the speed to the future. This is also based on relativity, which is not the same time.Movement speed in space will determine the speed of movement over time.

If a rocket is large enough, it can accelerate 9.8 m / s - by the acceleration of gravity on Earth, one can reach the center of the Milky Way 20,000 light-years away in just a few decade. These decades are the time people on the spacecraft feel. However, when the ship returned to Earth, about 40,000 years had passed.

People can control the speed to the future.(Photo: NBC News).

Time is relative but still moving in the same direction with everyone. Analyze general relativity to evaluate the possibility of going back in time. General relativity explains gravity as well as the complete link between space - time and movement.

The problem is that there are any arrangements of matter and energy - non-bending elements - does time allow a time loop to exist?"In a closed time loop, you will never move beyond the speed of light and time will return to the starting point, ie return to the past, " Sutter explained.

Some theories about space-time suggest that closed time loops may exist. If the universe is constantly rotating and has an expanding speed, the closed time loop will appear, people can return to the past, according to Kurt Gödel, a famous mathematician with the Imperfection theorem.

But every observation so far has shown that the universe is only expanding, not rotating. Therefore, his theory cannot be applied.

The second hypothesis is to create a large, infinitely long cylinder, placing it on the axis at a speed approximately the speed of light. It will drag around the space - time around, and there are points on the cylinder that will return to the original position, in other words return to the past. Of course, humans have not been able to create an infinitely large and long cylinder, so this is not feasible.

Worms are short cuts that connect two points away from each other in space-time.(Photo: YouTube).

Another hypothesis is to create wormholes - short cuts that connect two points away from each other in space - time and move a point at speeds approximately the speed of light and then pull back to the old position. The stretching effect will cause this point to "the future" of the other point. Therefore, humans can pass through wormholes to the past. However, the creation of wormholes requires something that does not exist as "negative mass".

Although returning to the past is possible under general relativity, in fact, there is no specific method. In contrast, researchers have not been able to give any principle of negative travel time. Science has yet to find out which particle interactions at the subatomic level prevent the formation of a closed time loop clearly.

The inevitable movement from the past to the future of time is like another natural law: Entropy . It is a law in thermodynamics, confirming that closed systems tend to change from orderly to chaotic. Maybe there is a relationship between time and entropy, Sutter predicted.