Professor Stephen Hawking was a traveling time explaining, and before he died this year he wrote his last book of the Short Answers to the Big Questions. In the book, the theoretical physicist wrote: "Space travel and travel can not be ruled back in time according to our current understanding." However, with the book being released after his death in March this year at 76, Cambridge University alumni can not fully explain his theory.
Peter Millington, Research Fellow at the Chronological Cosmology Group, School of Physics and Astronomy at Nottingham University, has stepped in to give a reply.
According to Mr Millington, a vehicle that can travel at light speeds, 299,792,458 meters per second in vacuum, or close to, would be able to travel to the future.
Mr Millington wrote in an article for The Conversation: "Einstein realized that the result of the speed of the absolute light is that space and time itself can not be.
"And it turns out that mobile clocks will tick some slower than unusual ones.
"Faster you move, slower your clock fits in relation to those that you move past.
"The word" relationship "is key: time will usually appear to you. For everyone who stands still, however, you will be in a slow move.
"If you were moving at the speed of light, you would seem freezing in time – as long as you were worried, everyone else would be quick on."
But in order to power a spacecraft or machine that can travel at this massive speed, it would be necessary to have infinite amounts of energy, which would be impossible.
Mr Millington ends: "So travel is a real chance? Our current understanding can not be controlled, but there's probably no answer."
However, Professor Hawking said that Einstein's research into gravity, space and time of 1915 had found a solution to the problem.
The physicist said that marvelous space-time, which occurs near huge stars and black holes, could be strong enough for people to travel in time.
This would happen by obstructing the universe fabric between two points in time and space – a lump load that travels time.
Traveling time may not be possible with modern technology, but it is within the land of the possibility that future civilizations will take advantage of this power.
Professor Hawking wrote in his bible book: "Einstein showed that he would take an infinite amount of rocket power to speed up a spacecraft to light speeds.
"So the only way to go from one side to another in a reasonable time would appear if we could accelerate space space so much that we had created a small tube or the hood hole.
"This could connect both sides of the galaxy and act as a shortcut to get from one to another and back while your friend is still alive.
"Such worm shrubs have been seriously suggested as being within the future capability of civilization.
"But if you can travel from one side of the galaxy to the other in a weak or two, you could go back through another worm hole and get back before you set out.
"You could even cope with her back in time with a worm hole if both of them were moving from" compared to each other. "
Hawking Professor 76 died during the early hours of March 14 following a long fight with a motor neurone disease.
He suffered a type of amyotrophic peripheral sclerosis (ALS) that starts at a rare early age, also known as a motor neurons or Lou Gehrig disease.
He was diagnosed with motor neurons in 1963 at the age of 21.
Doctors expected him to live for just another two years, but he had a type of disease that was moving slower than usual.