Time travel is a fantasy or quite realistic?

Based on physical laws, there is absolutely a theoretical basis for people to travel time to future, but the way people use the method is a difficult question.

Oppose time travel theory

Let's think about this paradox: If someone created a time machine and went back to the past to break this very machine, what would happen?

If the machine is broken and does not exist, how does it mean that the person has to go back in time to smash it?

That is an example of the anti-law of time travel theory when its mode of operation not only goes against the basic laws of physics but also against the law of humanity-effect in the movement of life. living.

Can we go to the future?

The universe is mobilized by a series of intermittent random effects relationships between all things, the law of birth, development and decline.

It is like a stable periodic structure, just a small effect deflecting, breaking a cell in this stability will lead to chaos and form a different form of structure.

Therefore, if you go back in time to kill Hitler to prevent the Second World War. Hitler dies, the world of peace, this leads to the fact that in the present you will not be able to return too much. to kill anyone. So your original purpose is actually no longer in the present world.

Worm hole

But for time travel researchers know that there is actually a very small flaw that scientists call worms.

Stephen Hawking is one of the scientists who think that in our world there are countless worm holes. These worm holes are the shortcuts through time and space.

This physicist's point of view fits perfectly with Einstein's theory of relativity and coincides with the logic of other veteran scientists about the nature of reality.

This worm is the shortcut through time and space.

This worm opens up opportunities to travel not only for hundreds of years but also to remote places in the universe. This means that it allows us to move faster than light.

But even though there are countless worm holes, how to use modern advanced spacecraft to go through these holes is another matter.

Even Stephen Hawking points out that wormholes are thought to exist just below the size of even a molecule. It was too small for a human to step in to allow advanced spacecraft to be used.

Butterfly effect

In Ray Bradbury's classic "A Sound of Thunder" short story in the early 1950s, Earth's prehistoric time travelers had to fly in the air to minimize photo work. enjoy the past.

Although they only accidentally crushed a butterfly but when they returned to the present many things, even the words to the election results changed differently and they had to live in another reality.

Bradbury's story first introduced the concept of "Butterfly Effect".

Bradbury's story, for the first time, introduces the concept of "Butterfly Effect" that often points to theories of chaos when only a small change in the past can lead to tremendous changes. future measurement .

If someone can overcome the space of time, they also face the equally big challenge that is how to go through time without affecting the past even if only a moment.

Going to the future is possible

In fact there is a case in existence between us that is considered to have gone through time.

It was Sergei Krikalev, an astronaut who had been in space for so long that it was calculated that he had gone to his own future at a rate of 1/200 of a second.

This comes from the time elasticity in the universe, which is based on Einstein's theory of relativity that we can measure.

Accordingly, when people move at a very fast speed, their clockwork will run slower than normal on the ground.

If returning to the past is impossible, traveling to the future is completely grounded.

Sergei spent two years in orbit on Mir and ISS stations and moved at 17,000 miles per hour. Sergei Krikalev is also slower in life when living in space compared to ordinary people

Suppose that if Sergei took two years in space to travel at nearly the speed of light, ie 40,000 times faster than the speed at which this astronaut was going around orbit, when he returned he would Seeing the Earth for two hundred years.

If it is impossible to return to the past, traveling to the future is completely grounded if we can create a machine that can take people at the speed of light.

But this trip will be a go no return.