How Everything Works
How Everything Works How Everything Works

Question 842

You mentioned that time perception is different for different locations in the universe. Were could we find a place where one day is equal to one thousand years of time on earth? — AWG, Karachi, Pakistan
The perception of time is different for observers who are in motion relative to one another. The issue is not how far away they, it's how fast they are moving relative to one another. If you were to observe a person who is traveling past the earth at almost the speed of light, you would notice that their watch is running extremely slowly. It might be as though you'd have to wait one thousand years for their watch to show that a day has passed for them. Yet paradoxically, they would make the same observation about you! You would see them aging slowly and they would see you aging slowly! The resolution to this apparent paradox lies in the differences in the perceptions of space that these differences in the perceptions of time. In this short answer, I can hardly begin to resolve the paradox. I'll simply point out that the mixing of space and time associated relativity are caused by relative motion not by relative position.

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