According to the Time Theory Physics Scientists

We know that time is a stream that flows from the past to the future. Every time there is change, there is distance, and also death. Time also becomes an omen when born, when birthdays and when the time comes until then extinct. The theory of physics says that time is not absolute, which means time show something relative to a reference.

Exemplified by Albert Einstein, the pioneer of the theory of relativity, for example when a car and look up the object outside the car is not moving, then the visible object is moving. Meanwhile, for those outside the car, then the person in the car said to move. Which is true, Einstein said that both are correct and this became known as the theory of special relativity.

Meanwhile, a more detailed explanation about the time that slows down, also presented in the theory of general relativity. Physicists describe the formula of three-dimensional space, it turns out there is still time referred to as another dimension. This means that in addition to the 3 D, the physicists to introduce the world's 4 D, with additional time. In other words can be guessed almost every place in the universe, has a different time and space with the earth or in any place lainn. To note is that time is also influenced by gravity. The greater the gravity, the slower time passes. From the theory of
 
relativity theory is then appear more extreme in which the scientists say there is a space of time is formed.

According to this theory, time can be stretched or compressed.

At a certain point where this time the gravitational force between curved to merge, eventually opened the door, called the passage of time. Travel this way, a researcher can predict the move by taking the time path.

Travel time becomes increasingly likely when the friend of research Einstein, Kurt Godel in 1949 showed that under the theory of general relativity, that time could actually spread by humans. Godel said that with this pembentangan there will be a time effect that could be a cause and effect. He said if someone could go back in time and kill his great-grandfather, then as a consequence on the future he will not be born

A lot physicists argue that a very strange sense of this. But there is no single reason that could undermine the theory. The scientists speculate that it may be done through time, but will not likely change the future that is now inhabited by human beings

Unable to change the current time

Physicist Daniel Greenberger of the City University of New York and Karl Svozil from Vienna Unversity of Technology, Austria shows the properties of quantum theory which ensures that time travel can not change the current situation, even if someone had succeeded to the past. "It's very contradictory, because for example I could come back into the past, how could I change the situation at that time, because then then indirectly I have been to thwart the mission of my trip to the past because the benchmark is the present, not future or the past, "said Karl Svozil.

Lee Smolin of the Perimeter Institute for Theoretical Physics in Canada said the time is real. However, formulated to find and unite all the particles in the universe can only be done by combining the theory of relativity and quantum theory. The result of understanding that is possible is that time does not exist or may exist but this time more than one.