Is Time Travel Possible?

By Sean Martin

TIME travel into the future IS possible – and all we need is a spaceship that can travel at the speed of light.

For centuries, scientists, philosophers, and the public have been exploring the possibility of time travel.

A greater understanding of physics and the laws of the universe have allowed scientists to virtually reach the conclusion that time travel backwards is not realistic, but traveling forward could be a reality.

Albert Einstein first proposed the idea that traveling at the speed of light away from Earth would slow down time for the traveler, while those back on Earth would experience time at the normal rate.

Theoretical physicist and string theorist Brian Greene, of Columbia University, said: “You can build a spaceship, go out into space [and travel] near the speed of light, turn around and come back.

“Imagine you go out for six months and you turn around and you come back for six months.” While you are traveling at the speed of light, time stays slow relative to the people who are standing still back on Earth. As a result, you would be going fast while your clock would still be going slow. Prof Greene: “When you step out of your ship, you’re one year older but Earth has gone through many, many years.  “It can have gone through 10,000, 100,000 or a million years depending on how close to the speed of light you traveled.” Stephen Hawking has also added to this, explaining the feasibility of it.

In the past, he said: “It would take six years at full power just to reach these speeds. “After the first two years, it would reach half light speed and be far outside the solar system. “After another two years, it would be traveling at 90 per cent of the speed of light. “After another two years of full thrust, the ship would reach full speed, 98 per cent of the speed of light, and each day on the ship would be a year on Earth. “At such speeds, a trip to the edge of the galaxy would take just 80 years for those on board.”

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