Although it is physically possible to travel in time, technological and philosophical complications continue to be insurmountable, while Paul Davies says the time machine is about money, not physics, Hawking dismisses the ability to travel back in its familiar "chronology protection conjecture" , made in 1991, the debate reveals the purpose of building a time machine, while it reveals the impossibility of travel to the second World War and the commitment of all to discover the causal structure of space time "Most physicists view time travel as problematic, if not manifestly impossible" said Professor Matt Visser, an expert on relativity of New Zealand, referring to the paradox whereby a traveler Time kills his grandmother when he is sleeping in the crib. However, Visser acknowledged that there is no mathematical proof to exclude the possibility that a time traveler to change his past, can be protected chronology, she wonders. "Despite a decade of work, we know nothing for sure about it, "and s easy to write the trip back in time as it does science fiction, but the existence of at least a detailed model of machine for time travel has led physicists like Hawking to develop a guess chronology protection on ruling out the possibility of a trip to the past, there are things in the universe who still do not understand. owever, the time travel into the future, in steps, is now commonplace, special and general theories of relativity of Einstein, written in 1905 and 1916 respectively, showed that very high speeds or intensified gravity can bend time in the same way you would a ball on a rubber sheet, the higher speed or increased severity, the greater the curvature of time, known as dilation.
"The theory allows to travel forward from the point of view of relativity," says Paul Davies, author of numerous popular science books and teacher Macquarie University. "It's something that depends on money, not physics," he adds, so the physical theory are determined in unraveling the mysteries that represents the journey to the past rather than explaining the journey the future, although it is conceivable according to the theories of Einstein, the journey to the past is very questionable, and that while future trips require only an acceleration speed, travel to the past involving exotic and dubious feats of engineering, Paul Davies wrote in 2001 the book How to build a time machine in which the model outlined a trip back from a variant of black holes called holes wormholes, black holes are formed by large stars that have died out and compacted, making a machine to travel back in time needed of 2 black holes linked together through a wormhole, that in this way would be a door to the past.
3 Steps to Travel to the Past
- First, a tiny wormhole would be created in a particle accelerator, a structure similar to that which has CERN in Switzerland and the Brookhaven Laboratory in New York.
- Secondly, this tiny wormhole might be inflated and maintained in this state through yet undeveloped exotic matter, like antigravity.
- Thirdly, a wormhole mouth would turn into a particle accelerator to near light speed for a decade, so there would be a time dilation difference between the 2 openings wormhole, joining the 2 openings of the wormhole, we would have a machine to travel back in time.
to the theory of relativity,
has been infallible for years, has considered the possibility of travel to the past, no evidence has been excluded, although there have been experimental scientific fields such as superstrings, quantum gravity or parallel universes, where the traveler by the mere fact of traveling through time, is bound to enter one of the parallel universes and is unable ever to return to the universe from which he left for the first time in the time machine.
- Secondly, this tiny wormhole might be inflated and maintained in this state through yet undeveloped exotic matter, like antigravity.
- Thirdly, a wormhole mouth would turn into a particle accelerator to near light speed for a decade, so there would be a time dilation difference between the 2 openings wormhole, joining the 2 openings of the wormhole, we would have a machine to travel back in time.
to the theory of relativity,
has been infallible for years, has considered the possibility of travel to the past, no evidence has been excluded, although there have been experimental scientific fields such as superstrings, quantum gravity or parallel universes, where the traveler by the mere fact of traveling through time, is bound to enter one of the parallel universes and is unable ever to return to the universe from which he left for the first time in the time machine. 
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