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Time traveling has been one of the most fascinating concepts we have today. In fact, there are numerous time travel movies franchised, showing different concepts and means to make it possible.
How would we want to ride a DeLorean time machine car like Doc Brown and Marty in ‘Back to the Future’ or own a time-turner like Hermione in ‘Harry Potter and the Prisoner of Azkaban?’ Sure, those were really cool inventions from the movies. But, is time travel really possible in real life?
Apparently, yes. In fact, we are traveling in time now at a rate of one second per second. We travel in only one direction and that is towards the future. However, what we ought to know is, could we travel faster or slower than one second per second? Could we travel faster forward to the future or back to the past? Is it possible to do it to alter the present? We certainly have many mind-boggling questions about time travel but there are still limited facts to address it.
According to Albert Einstein, time is an illusion. It is relative and it varies depending on the observer’s time in space. We all have our own times and it differs only by how we move. Einstein’s theory of relativity claims that it is actually possible to warp time to an exponential degree until it folds itself creating a time loop. If we ride a spaceship and depart the Earth at a constant acceleration that could produce a force equal to the gravity of the Earth, we could approach the speed of light relative to the Earth in just one year. As the ship’s speed comes to the speed of light, its clocks would run at a slower rate than the clocks on the Earth. Thus, if say, we travel a distance of some 60,000 light-years around the center of our galaxy and back to the Earth, it would be completed in more than 40 years of ship time. By the time we get back to the Earth, we only aged 40 years while Earth is 60, 000 years older. This is just one of the possible means to travel through time with speed and gravity as the main method.
Another possibility is moving a ship through a blackhole. A blackhole is a region of space with an intense gravitational field that no single matter, even radiation can escape. According to Physicist Stephen Hawking, once a ship enters a black hole, it’d go around and around, experiencing just half the time of those who are far away from it. Thus, if say, we circle a black hole for 10 years, 20 years would be passing elsewhere and once we got home to Earth, everyone would’ve aged 10 years than us.
There are still loads of studies being conducted to prove that we could possibly travel through time. We really never know when these studies would lead the inventors to create a time machine or time-turner necklace. But for now, time travel still remains a possibility.