November 04, 2017
TIME travel is possible, but would be extremely difficult to achieve, according to a top university.

Time travel is possible and black holes hold the key

In a piece written for the University of Sussex by astrophysicist John Gribbin, co-authored with his wife Mary Gribbin, they say that “there is nothing in the laws of physics to prevent time travel.
“It may be extremely difficult to put into practice; but it is not impossible.”
Sci-fi fans and scientists alike have longed for the possibility of time travel, and it could one day be a reality.
The research from Mr and Mrs Gribbin says that two things are required for time travel; an understanding of Albert Einstein’s general theory of relativity, and black holes.

Time travel is possible and black holes hold the key

The article reads: “the possibility of time travel involves those most extreme objects, black holes.
“And since Einstein's theory is a theory of space and time, it should be no surprise that black holes offer, in principle, a way to travel through space, as well as through time.”
As the distinction between time and space surrounding a black hole becomes almost indistinguishable, experts believe that the mysterious entities could be the key to time travel.

Time travel is possible and black holes hold the key




However, there are a lot of mitigating factors.
The main issue is that anything that comes close to a black hole is sucked in by its immense gravitational pull, which is so strong that not even light can escape – what is known as the ‘singularity’.
However, if the black hole is rotating, it might offer a portal into the past or future.
The article explains: “In the 1960s, the New Zealand mathematician Roy Kerr found that things are different if the black hole is rotating.
“A singularity still forms, but in the form of a ring, like the mint with a hole. In principle, it would be possible to dive into such a black hole and through the ring, to emerge in another place and another time.”
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