Einstein's theory of relativity tells us that travelers who make a high-speed trip to a distant star and back will age less than people who stay behind on earth.
According to Einstein's theory of relativity, time and space are relative to each other.
In his theory of relativity, he has shown relativity between light, matter, speed of light, and energy.
If an observer is moving at a fast speed, then he will observe that the distances between time and space also change and they change according to the speed of the observer.
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