29th May 2018 22:50 EDT
Time travel remains the stuff of science fiction – right? Scientists say that some kind of time travel is already possible today.
It may not be as dramatic as Hollywood is. For now, the time travel remains a one-way street.
Jumping into the Future
Paul Sutter, an astrophysicist at Ohio State University, points out that people are already taking time travel and saying that "back to the future" is already common practice.
"It's all about really, very fast going," Sutter explains in an email to Space.com citing Albert Einstein's Theory of Relativity. "The faster you move around the room, the slower you move through time, and we've been able to measure this with ultra-precise atomic clocks in jet aircraft, and the accuracy of the GPS system needs to take that into account." 1
After all, astronauts who travel aboard the International Space Station faster than normal humans on Earth can be considered as time travelers. When they are on the ISS, they age only a little slower than on Earth. The NASA Twin Project proves this when Scott Kelly came home after a year in space and discovered that the gap between him and his twin brother Mark grew by a few milliseconds.
J. Richard Gott, a physicist at Princeton who authored the book Time Travel in Einstein's Universe tells Popular Mechanics that it's pretty easy – theoretically – to send people into the future.
"If you want to visit the Earth In the year 3000, you just have to get on a spaceship and go 99.995 percent of the speed of light," he says.
The earth would spin for a thousand years, but an astronaut who would make the trip would have her The inner clock slows down due to the speed of her flight.
"[Their] o'clock will tick with 1/100 the rate of clocks on earth. [They] will only become about 10 years old," God
What about the past?
Of course, the drawing of time travel is largely to look in the past.
Unfortunately, for those who want to go back in time, there is no viable way to accomplish this right now. There are a handful of theories on how to achieve it, such as faster than using speed of light or wormholes as shortcuts to space-time points. However, other laws of physics make it unimaginable for humans.
"But all these scenarios end up violating other known physics, such as the demand for negative mass or infinitely long rotating cylinders," explains Sutter, adding the physical laws of the universe "spoil the fun."
For the time being, mankind relies on this timeline for good or good.
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