Starting off my first question, how is time in space or on other planets different to earth is it just that it takes longer for that planet to do a full rotation meaning longer or more hours in a “day”?
then if Space/planet time is different to time on earth, how dose someone age slower in space than they do on earth, wouldnt your body still be replacing cells at the same rate and be “aging” at the same time?
is the “1 hour here is 7 hours on earth” just some movie gimmick for drama
In: 1
These are typically two separate considerations as you’ve already alluded to.
The first deals with the physical properties of the orbit, the tilt, the speed in which the planet spins on its axis.
The second deals with relativity as it pertains to the speed of light.
A person in space will not age slower than someone stationary, not to any appreciable degree. Satellites move at about 17k mph, they lose [about 7 microseconds a day](https://www.astronomy.ohio-state.edu/pogge.1/Ast162/Unit5/gps.html) to relativistic effects.
So you’d have to be moving much faster, much closer to the speed of light.
And that’s because time isn’t constant. The speed of light is. Space and Time will both warp itself to meet the constraints of that.
It’s not intuitive, and it’s not eli5, not easily. It’s Special Relativity, and even very smart people have spent more than a century trying to comprehend it.
Just know, time isn’t constant.
edit: Just because.. if you were moving at 17k mph, going away from Earth. If you travelled in one direction for 35 years, turned around and came back. Your twin would have aged 178.5 *seconds* more than you. That’s based on 7ms * 365 * 70. About 3 minutes over an average lifetime.
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