ELi5 If time is slower at space, would you still age at the same rate as you would on earth?
In: Physics
From your perspective, yes. If you “experience” a year on the ship, you’ll be a year older.
However time is not an absolute quantity. While a “year” for you is always a year, your clock may be running slower or faster compared to a clock on earth: so while it may have been a year for you other people may have experienced for instance only four weeks. The result is that you are now eleven months older than your twin.
However time dilation really only becomes noticeable to humans at either extreme speeds or extreme gravity. For pretty much all human space adventures with modern technology the difference between a human that went in to space and a human that stayed behind is a few milliseconds at most.
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