TIME TRAVEL What we should know If you sit in a rocket moving at a speed of 0.86 times the speed of light, you will age slowly—half of the aging rate on earth. However, your rocket needs to have a speed of 2.59 lakh Km per second for this. And our rockets need a minimum speed of just 7.9 Km/s to reach space. And if you’re moving at a speed 99.9999999% of the light, by the time you wake up next morning in your spaceship, more than 100 years would have been passed on earth—all of your friends would marry, grow old and die whereas you will be just one day older than you left. This is based on Einstein’s theory of relativity. Einstein said— “The time on fast-moving objects goes by much more slowly than the objects at rest.” We perceive time according to the speed we are moving When you leave the earth, the speed does change

And the thing is that if you are on fast-moving objects, it’s not just that the only clock will slow down. On the contrary, everything would slow down—including your age and other biological functions. However, your perception of time also would slow down, so you would not experience this slowing down of time. You would not feel like being in slow motion. Many people who misunderstood the relativity concept, try to claim that Einstein might be wrong—such as the “Twin-Paradox” argument. But, Einstein’s concept is practically used in GPS technology. Since the satellites used in GPS moves faster ( At around 29000KM per second), time inside them spends slower than the earth. Each day there is a mismatch of around 38 microseconds. Although this is such a small time, the GPS needs higher accuracy—in nanoseconds. So yeah, this small mismatch of microseconds is 1000 times more than the accuracy required. So clocks are regularly adjusted and this time dilation is actually taken into an account. So if scientists hadn’t adjusted the clocks, the place you’re looking on Google Maps might actually have been a few kilometers away.