Question

How can we say time is relative and we can do time travel ? Is there any possibility

Answer 1

The best example is our own universe and the night sky. The stars which you are watching at night (some of them) may be not at that position or may have died out. The light which you are seeing is the light wave which was previously produced by the star and now that light wave has traveled few light years distance to reach our eye. May be after one year you will not be able to see that star againtime travel into the future is possible, but we would need to develop some very advanced technology to do it. We could travel 10,000 years into the future and age only 1 year during that journey. However, such a trip would consume an extraordinary amount of energy. Time travel to the past is more difficult. We do not understand the science as well.