NASA Knows Time Travel is Fact?

AI Thread Summary
The discussion centers on the concept of time dilation as explained in a documentary about time travel. It highlights that NASA adjusts satellite clocks due to the effects of special and general relativity, which state that time passes differently for objects moving at high speeds or in varying gravitational fields. A key point is that while fast-moving objects experience time differently relative to an observer, they do not perceive their own time as altered. The term "time travel" is debated, with some arguing that true time travel implies skipping time rather than merely experiencing time at different rates. Overall, the conversation emphasizes the scientific principles behind time dilation and the adjustments made for satellite technology.
Niels Bohr
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Hello,

I just completed viewing a documentary on The Learning Channel on time travel, and what they said greatly suprised me: satellites that NASA uses are set up so that the clock on the satellite is rewinded or set to adjust to the fraction of a second the satellite gains by traveling around Earth at a faster speed than the Earth rotates. In other words, NASA knows fast moving objects time travel into the future, so they have to adjust the clocks, or at least this is what the narrator claimed on the show I just watched today.

Regards,

Niels Bohr
 
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Every physicist on Earth understands both special- and general-relativistic time dilation.

- Warren
 
Originally posted by chroot
Every physicist on Earth understands both special- and general-relativistic time dilation.

- Warren

Can you summarize the theory for me?

Thanks.

Niels Bohr
 
haven't you ever seen star trek? they travel faster than the speed of light, yet they don't travel in time.
 
Originally posted by Niels Bohr
Can you summarize the theory for me?

Thanks.

Niels Bohr
When a clock travels with a high velocity relative to you, it will appear to you to run slowly.

When a clock is higher than you in a gravitational field, it will appear to you to run slowly.

Both of these effects are necessarily considered for timing satellites like the GPS.

- Warren
 
Originally posted by Niels Bohr In other words, NASA knows fast moving objects time travel into the future, so they have to adjust the clocks,
I'm sure they did not say the clocks time travel to the future.
The claim made by the theories of Relativity is that the faster an object is going relative to you, the observer, the slower time passes for that faster object when you, the observer, measure it. A person on board the faster spacecraft doesn't measure his own time as passing any differently, though. To them time passes normally. Strangely, if they measure our time, our time is measured as going slower.
 
I don't consider this "time travel." "time travel" to me would mean making a jump to another time, skipping the time between. Otherwise, I'm sitting here now experiencing time travel.
 

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