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There is time in space. If you floated around in space in orbit of the Earth, time would still work approximately the same as when you were on Earth.

However, time can change according to the theory of relativity. For example, we know the speed of light always appears to be 299,792,458 m/s regardless of how fast you think you're travelling from the light source. How can this be true? The only way this can be true is that time advances relative to how fast you're travelling compared with other things.

We know Alpha Centauri (our nearest neighboring solar system) is approximately 4.4 light years away. It might be possible to jump in a space rocket one day in the future, and think you're flying there and back in half this time. For an observer on Earth, the return trip would always take > 8.8 years, although the person doing the trip might think they did it quicker.

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15y ago

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