If someone is on Earth, and the other is in space, why would their wrist-watch show a different time?

Question

I understand that space travel affects time, but why would it affect the mechanisms of a watch? doesn’t it just go tiktik u know?

In: 11

Answer 1

You can look up time dilation. A clock on the ISS is technically .01 seconds delayed every 12 months compared to one on earth. Velocity and distance to a massive body impact time dilation. Same with interstellar. A clock on a near the edge of a black whole would experience time much slower being so close to a heavy mass.