For the life of me I cannot get my mind to understand the relativity of time and gravity and space

[88m3]

What would Picard do?

 

[Professor Emeritus]

Time in reality is something much more abstract. We don't even know at what percentage of the speed of light that we're traveling at right now. Earth rotating, orbiting the sun, sun in orbit around the supermassive black hole atg the center of the galaxy, the galaxy moving thru the universe at who knows how fast. As i'm sitting here typing i'm moving at an absurd speed if the speed of light is the cap then who knows we might be moving at 99% of that speed. So time is already dilated.

Well so long as we're talking about special relativity and speed, then the answer is "you are moving at every speed", because speed is purely relative to the frame of reference. If your frame of reference is a neutrino moving away from Earth at 99% the speed of light, then yes, you're moving at 99% of the speed of light in reference to that neutrino and your time compared to it is dilated accordingly. But if your frame of reference is the couch you're sitting on, then you aren't moving at all and are experiencing absolutely zero time dilation with respect to the couch. That entire spectrum is always true, at all times.


But if we're talking general relativity and gravity and acceleration then it's a different question.

 

[null]

The initial issue is that for me 'time' is just a measurement to me. A second is no different to me than a meter, or a kilogram, or a gallon. Its just...a measurement.

they are metrics. time is a metric for duration.

distance metric changes too under high velocities or gravitation.

Length contraction - Wikipedia

So, the idea that this measurement, or how that measurement is perceived changes related to heavier gravity or change in space is just something I cannot process.

I have watched this really Fischer Price 'My first science class' ass video like 3x

they even address the issue I have

but it is some blindspot i have. I can't get there and I hate it.

I love interstellar, its a GOAT movie, and this still bothers me.

watch these two and it will all make sense.



and



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remember:

i. our speed through space-time is always at a constant velocity. speed up in one vector and you slow down in others.

ii. that feeling of gravity that you always feel is constant acceleration. go into space and you will feel like you are falling .. all of the time.

 

[null]

If interstellar crafts have traveled to earth at even a 10th of the speed of light then wherever they came from time has passed so much that these craft could be obsolete compared to what that civ has produced or their home world could be gone by now. One thing that blows my mind is light traveling from distant objects. Is that light "younger" than the object because of time dilation? We look at the sky and we look at the past but that light is "younger"than the objects we see.

no the light is not younger. for you as an inertial observer the time is the time. no relativistic adjustments.

the time is different for the light itself. in the case of the photons themselves no time has passed.

Why don't photons experience time?

 

[null]

If we could pinpoint a spot in "space" and remain there stationery would time stop?

no time duration at the event horizon of a black hole.

physics breaks down (our laws) in the singularity at the center of the black hole.

black holes.. they are all over the place. at the center of every galaxy (some say ...)

Why does time stop in black holes?

with enough pressure you can make a black hole out of anything .. any normal matter.

 

[null]

No, gravity is force. We measure it using metrics the acceleration of mass (N).

yet it is .. sort of .. but we need to remember that gravitons are still theoretical.

"In theories of quantum gravity, the graviton is the hypothetical quantum of gravity, an elementary particle that mediates the force of gravitational interaction. There is no complete quantum field theory of gravitons due to an outstanding mathematical problem with renormalization in general relativity. In string theory, believed to be a consistent theory of quantum gravity, the graviton is a massless state of a fundamental string.

If it exists, the graviton is expected to be massless because the gravitational force has a very long range, and appears to propagate at the speed of light. "

gravity still works if we consider that gravity warps space rather than pulls objects.

"Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as the curvature of spacetime, caused by the uneven distribution of mass, and causing masses to move along geodesic lines."

Gravity - Wikipedia

and we are assuming relativity in this discussion I think.

If gravity isn't a force, how does it accelerate objects? (Advanced) - Curious About Astronomy? Ask an Astronomer

 

[null]

But why would a human or a being age differently?

because time is moving differently.

 

[acri1]

The thing you have to realize is that time can't really be separated from space.

If you want to describe where something exists in spacetime, you need three spatial coordinates and one time coordinate. Without all four you can't describe an event. Gravity is literally just the curvature of spacetime. So if gravity can cause space to distort (which has been observed many times) then it can also do the same for time.

Basically, matter and energy warp spacetime. We perceive the warping of spacetime as gravity. So it's kind of the other way around...matter warps spacetime and that actually causes gravity.


Here's a good video on it -

 

[null]

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