The genius of Albert Einstein has helped people enlighten the physics of time travel.
Is travel time real or just a product of imagination? In the past, it was thought that travel was contrary to the laws of physics, but at that time, "the ancients" considered Newton's physics. When Einstein's theory of relativity came into being, everything changed.
Thanks to Einstein's theory of relativity and the expansion of time, we can confirm that time travel exists, based on the distance we have traveled in space and at what velocity.
A pair of twins have a brother who is an astronaut, while his brother lives and works on Earth. When his brother travels at a speed near the speed of light and then returns, watching from the perspective of the Earth, the trip will take tens of thousands of years. But because his brother's movement is relatively high relative to Earth, his brother will grow old more slowly than his twin brother. When he returned from the journey, the elder was only a few years old, but his brother had long since died.
But not just fantasy, we have real facts: we have individuals who have actually traveled the time.
It was astronaut Sergei Krikalev who lived a total of 803 days, 9 hours and 39 minutes in orbit. Returning after a 748-day journey on the Mir space station, Krikalev was told he had "grown young" 0.02 seconds longer than Krikalev himself if he lived on Earth.
Currently, Sergei Krikalev is holding a record of travel time in this form.
Time dilation is caused by the difference of gravity or relative velocity, each of which justifies time in a different way. When astronauts fly in orbit, they are farther away from the center of the Earth than those on the ground (obviously!), So they suffer less from gravity.
However, the expansion of the time that humans experience is quite small, because of the gravity of the Earth is quite weak. That's Colin Stuart's comment, and he adds that "the time dilation due to velocity is significant, the astronauts traveled to the future with a very small amount of time."
But with the current technology, the speed of astronauts is limited, so the change in time is very small. For example, after six months on the International Space Station, astronauts only "travel" about 0.007 seconds. It would be even more likely if the ISS would fly at about the speed of light - about 300,000 km / s instead of the current "turtle" velocity - about 7.7 km / s.
This phenomenon has been demonstrated by another time-traveling object, the GPS satellite, which flew around the Earth at a speed of 14,000 km / h (3.8 km / s). Every day, the satellite's clock is several microseconds faster than Earth's clock.
Dr. J. Richard Gott, a space physicist from Princeton University, says that it is possible to combine high velocity and gravitational fields to efficiently travel time in the Solar System. Astronauts only need to travel to Mercury, living 30 years there, to travel 22 seconds, compared to living on Earth. It also does not work.
The seconds are short, but Gott adds that astronauts have not gone so far into space. I have only moon, which is only 1.3 seconds from the Earth. Of all the people present on Earth, only the astronauts who are capable of traveling the highest time, must expect them to do miracles.
