Christina Koch returned from a 328 mission aboard the ISS. In college we learned that she would not experience time the same as us on earth over the 328 days. How can this be true and by how much younger would she be than you or I?

Question

In my undergrad physics course we were taught the basics of relativity. It was explained to us that something moving near the speed of light can somewhat time travel when compared to a stationary observer. So, how much younger would [Astronaut Koch](https://www.google.com/amp/s/amp.usatoday.com/amp/4676940002) be than us and how does this phenomena work?

In: Physics

Answer 1

the basic premise is that when you move faster, in order for the speed of light to remain the same, time has to slow down. this is because space and time are related (space-time continuum). The actual amount of time dilation experienced at orbital speeds is very low, so low that you’d never tell the difference.