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
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The *Interstellar* planet was orbiting a massive black hole, and traveling at such incredible speeds that relativistic time dilation begins to become significant and it actually experienced time at a significantly slower rate than “normal.”
This is a real thing, but you have to move very fast for this to happen, appreciable fractions of the speed of light to make a significant difference.
We’ve never actually observed a planet in such a gravitationally extreme environment, and it’s probably not possible to remain in a stable orbit under such conditions.
The planets that orbit normal stars in normal orbits aren’t moving anywhere near fast enough for this exotic time dilation effect to become noticeable. Their “day” and “year” are different because their orbits are different but the actual rate you’d experience time is the same.
Now the very minor differences in orbital speed do produce a very slight time dilation effect, enough to throw off precision timing in positioning equipment. GPS satellites have to correct for the fact that their clocks run slightly slower than clocks on Earth.
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