Relativistic time- dilation means that astronauts aboard a spaceship traveling close to the speed of light will actually age less than their families left behind on the Earth.

Question

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This is a confirmed prediction of Einstein's theory of relativity, commonly known as the "twin paradox". Due to time dilation, the faster an object moves, the slower time passes for it relative to a stationary observer. As a result, a spaceship traveling close to the speed of light will experience less time than Earth, meaning that the astronauts on board will age less than their counterparts on Earth.

Relativistic Time- Dilation Means That Astronauts Aboard a Spaceship Traveling