# How to travel through time?

# How to travel forward in time?

## Traveling at the speed of light

To travel into the future we can take a spaceship and travel at a speed near to the speed of light far away from the earth and after spending some time in space. When we return to earth, we can see that many years have passed on earth but we are still young. This is a possible method of future travel according to Einstein’s special theory of relativity.

Based on the technology available now we won’t be able to travel at the speed of light as we don’t have engines to power a spaceship with such high speed. Fuel is also a major problem because we won’t be able to take the fuel required for the flight with us.

## Traveling around a Black Hole.

To travel into the future we can use black holes. We can travel to our nearby black hole. A black hole is a place having the highest gravity in the universe such that even light cannot escape from it. We can go to that black hole making a few laps around the black hole on our way back to earth seeing centuries have passed on earth whereas only a few years for us. Since we know that this is also a possible method with respect to Einstein’s general theory of relativity.

Our nearest black hole is 3000 light-years away which is beyond our reach with the existing technology and we have to carefully select the trajectory around the black hole. If we lose our trajectory even for a millisecond the gravity around the black hole is so high that it would devour the spaceship. So better plan before going to the unvoyaged path.

## Traveling through a wormhole.

Wormholes are tunnels through space-time as proposed by Einstein’s theory of the space-time relationship. Einstein also proposed that space, time are related. Let’s not get into details of the wormhole as I have explained in my article on Anywhere door with a wormhole. So as we know wormholes form a bridge between spaces that are billions of light-years away. We can use them to travel through space. If we have the technology, We can place both sides of the wormholes side by side to each other so that when we travel through the tunnel spanning over many light-years and return back to earth. We can see time has significantly changed on earth allowing us to travel from time to the future.

No known wormholes to us in the universe. So to travel through them we have to create our own wormholes large enough, stable enough to allow us to travel through it safely. According to Stephen Hawking, wormholes are occurring on a quantum scale in our planet. But we don’t have the technology to catch them and spread them large enough to fit a human. To do this we need exotic matter which has a negative mass such that it opposes the earth’s gravity and makes the wormhole stable. Exotic matter is yet to be invented.

# How to travel back in time?

Past time travel is also possible but has many complications and paradoxes associated with it. Past time travel can only be achieved through wormholes.

## Accelerating wormholes

Consider a case where one end of the wormhole is stationary and the other end is rapidly moving at the speed of light with respect to the stationary end. So when we travel from the accelerating end to the stationary end with watches in our hand we can see that time would travel backward through them. Allowing us to travel back in time.

## Traversable wormholes

There are lots of unproven theories that tell about time travel to the past. Out of which Closed Time Curve is one of the proposed theories. This indicates that when we move in a closed-loop in space-time it theoretically allows traveling to the past. This can only be done by using two-way wormholes which are known as traversable wormholes as per the theory.

To learn furthermore about Time Travel and the paradoxes associated with it do check my blog on Time Travel | All the Stats, Facts, and Data You’ll Ever Need to Know

*Originally published at **https://www.futuretechideas.com** on May 24, 2021.*