Most of us have heard about a Time Machine at some point of time during our life. It has capabilities to go back to the past or travel faster than time straight into the future. We have also heard that this machine is more of an imagination of some great scientists and is too far away from being a reality. Time travel is possible only in stories and not in real life. Well, after reading this your perception is bound to change.
The most recognized work in this field has come form some of the greatest brains of all times – Albert Einstein and more recently from Stephen Hawkins. As many physicists put it, time traveling is traveling in the fourth dimension. Traveling in this dimension means one is covering distance in Time. It is like you might travel really fast from one point and after some time end the journey at the same point but you have traveled across a different time zone.
The key behind time travel is to understand the fact that like a river, time also flows with different pace at different places. One of the greatest helps in time travel comes from our GPS. The satellites in space are equipped with some of the most precise clocks ever built. But even then they gain around a third of a billionth of a second every day. This needs to be corrected regularly else the entire GPS system might crash. This simply shows that time travels faster in space then on earth. The main reason for this is the massive mass of earth which drags the time. The heavier the object the more it drags the time. This entire thought suggests that time does travel differently at different places and thus opens up the gates for time travel.
In our galaxy there is a huge black hole. Its mass is equal to the combined mass of four million suns crushed down into a single point by its own gravity. Not even light can escape from its immense gravitational force. This also drags the time and thus acts as a natural time machine. If we can make a fast moving vehicle to travel to that black hole and orbiting it then we can travel in fourth dimension of time. For people on earth the space ship would orbit once around the massive black hole in 16 minutes but for the people inside spaceship they would be doing so in 8 minutes. So if they return to earth after 10 years then actually 20 years would have passed and everyone on earth would has spent 10 more years then the crew.
Another possible method of traveling in time is to travel really fast. For this imagine a track made across the earth and a vehicle moves on it with a speed close to the speed of light. In this case the time for those on board would move really slow then for those outside. Like this if 100 years passes for outside world then for those on board would only be 7 days older. Thus they would have traveled about 100 years in just 7 days.
Time travel thus surely a possibility. It’s just that right now we might not have the correct technology with us to travel across time. But it would surely be possible in future. Watch out for time travelers.