Is True Time the Key to Understanding Light Speed and Relativity?

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SUMMARY

The discussion centers on the concept of "True Time" in relation to light speed and relativity, specifically addressing the implications of Earth's velocity relative to the Cosmic Microwave Background Radiation (CBR) at 390 km/sec. Participants calculated that this velocity results in a time dilation effect, leading to discrepancies in the measurement of the speed of light, which they argue is actually 299,792.204 km/sec rather than the commonly accepted 299,792.458 km/sec. The conversation highlights the importance of understanding time dilation and the relativity of measurements based on different frames of reference, particularly in astrophysics.

PREREQUISITES
  • Understanding of special relativity principles, including time dilation and the constancy of the speed of light.
  • Familiarity with the Cosmic Microwave Background Radiation (CBR) as a reference frame.
  • Basic knowledge of astrophysics and celestial mechanics.
  • Ability to perform calculations involving relativistic effects on time and distance.
NEXT STEPS
  • Research the implications of time dilation in GPS satellite technology and its corrections.
  • Explore the concept of the Cosmic Microwave Background Radiation and its significance in cosmology.
  • Learn about the mathematical framework of special relativity, including Lorentz transformations.
  • Investigate how different frames of reference affect measurements in astrophysics.
USEFUL FOR

Physicists, astrophysicists, and students of relativity who seek to deepen their understanding of time measurement, light speed, and the implications of relative motion in the universe.

  • #31
JesseM said:
As DaleSpam said, your use of the phrase "absolute" simultaneity is confusing, usually "absolute" means "the same in every coordinate system", yet you seem to allow different coordinate systems to have their own distinct "absolute simultaneity". Each coordinate system of course has its own well-defined notion of simultaneity, this is just as true of inertial coordinate systems in SR as it is of cosmological coordinate systems. According to the way you use the phrase "absolute simultaneity", can you imagine any coordinate system where it would not be true that "absolute simultaneity holds"? Doesn't every coordinate system by definition have a single yes-or-no answer to the question of whether two events have the same t-coordinate or not?

JesseM said:
Again, this makes little sense if we interpret "absolute" to mean "coordinate-independent" as is normally done, so if you are using a different definition of "absolute", you need to spell out what that definition is. Why couldn't I just as easily talk about the "absolute simultaneity of the inertial coordinate system that is convenient for me to use in SR because it is the frame in which I am at rest"?
There is one notion of simultaneity in the FLRW metric, and if we zoom in on smaller and smaller regions of curved spacetime in GR until finally we make a transition to using SR spacetime (with or without inertial frames) then we are moving from one GR coordinate system that is convenient to use in cosmology to a set of SR coordinate systems that are convenient to use in a laboratory. Within this set of SR coordinate systems we could choose to have absolute simultaneity that is consistent with the cosmological coordinate system we are using, or we could choose to have relative simultaneity that is disconnected from our cosmological coordinate system.

The point is that in both flat SR spacetime and the curved spacetime found in cosmology you are free to pick different coordinate systems with different definitions of simultaneity, and there is nothing in the laws of physics to cause you to prefer one coordinate system over another.
I agree, but you are the one who singled out inertial frames as being equivalent to the coordinate system of a freely falling observer in a small region of spacetime in GR. These are not the only valid coordinate systems for freely falling observers. They may be more convenient to use in a small region because they allow us to drop tensor notation, but is there any other reason that you singled them out?
 
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  • #32
Aether said:
I clearly said that I was talking about the "absolute simultaneity of coordinate systems that are convenient for use in cosmology".
It is certainly not standard, but you are obviously free to define "absolute" to mean "convenient for use in cosmology". I have no objection to the claim that the time coordinate in the FLRW metric is convenient for use in cosmology.

Aether said:
Why don't you go back to the other thread ... and then accuse me there of making a semantic argument?
What happened in some other thread is irrelevant to the question of whether or not your argument here in this thread is purely semantic.
 
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  • #33
Aether said:
There is one notion of simultaneity in the FLRW metric
Only if by "metric" you refer to the expression for the line element in a particular coordinate system, rather than to the curvature of spacetime (a geometrical notion which is expressed differently in different coordinate systems). For the same curved spacetime representing the same FLRW universe, you can come up with an infinite number of different coordinate systems with an infinite number of different definitions of simultaneity.
Aether said:
and if we zoom in on smaller and smaller regions of curved spacetime in GR until finally we make a transition to using SR spacetime (with or without inertial frames) then we are moving from one GR coordinate system that is convenient to use in cosmology to a set of SR coordinate systems that are convenient to use in a laboratory.
Why a "set" rather than a single SR coordinate system which is most convenient to use because it represents the laboratory's rest frame? You're really making an artificial distinction if you act like there's only one possible coordinate system that's "convenient" in cosmology but a set that are "convenient" in SR, this depends on an arbitrary aesthetic choice of what you find convenient.
Aether said:
Within this set of SR coordinate systems we could choose to have absolute simultaneity that is consistent with the cosmological coordinate system we are using
How could you "choose to have absolute simultaneity", exactly? Simply by throwing away every local inertial frame except for the one whose definition of simultaneity matched that of the cosmological coordinate system?
Aether said:
I agree, but you are the one who singled out inertial frames as being equivalent to the coordinate system of a freely falling observer in a small region of spacetime in GR. These are not the only valid coordinate systems for freely falling observers. They may be more convenient to use in a small region because they allow us to drop tensor notation, but is there any other reason that you singled them out?
You can "drop tensor notation" in non-inertial coordinate systems too. What makes inertial coordinate systems special is that when you do express the laws of physics in non-tensor form, you find that the laws turn out to obey the exact same equations when expressed in any inertial coordinate system, while they'd obey different equations in non-inertial coordinate systems. This is a symmetry that's built into the laws of physics, we can imagine different laws of physics where this wouldn't be true, in which case all inertial frames wouldn't be on the same footing physically in this way (so all the different inertial frames' definitions of simultaneity wouldn't be on the same footing either).
 
  • #34
JesseM said:
Only if by "metric" you refer to the expression for the line element in a particular coordinate system, rather than to the curvature of spacetime (a geometrical notion which is expressed differently in different coordinate systems).
I am referring to the FLRW metric that I linked to in post #18 above which gives one definition of simultaneity (the hypersurface of homogeneity).

For the same curved spacetime representing the same FLRW universe, you can come up with an infinite number of different coordinate systems with an infinite number of different definitions of simultaneity.
Okay, I didn't claim that this definition was unique, only that it was "one GR coordinate system that is convenient to use in cosmology".

Why a "set" rather than a single SR coordinate system which is most convenient to use because it represents the laboratory's rest frame?
We can define an inertial frame \Sigma to represent the laboratory's rest frame, but then we would also need to define frames for objects in relative motion to \Sigma to do SR.

You're really making an artificial distinction if you act like there's only one possible coordinate system that's "convenient" in cosmology but a set that are "convenient" in SR, this depends on an arbitrary aesthetic choice of what you find convenient.
I am not claiming that there is only one possible coordinate system that is convenient in cosmology, only giving an example of one that is convenient.

How could you "choose to have absolute simultaneity", exactly? Simply by throwing away every local inertial frame except for the one whose definition of simultaneity matched that of the cosmological coordinate system?
No, I would first define a locally co-moving \Sigma inertial frame at any small co-moving region of the cosmological coordinate system, and then use Mansouri-Sexl (aka, LET, GGT, etc.) transforms instead of Lorentz transforms between SR frames in relative motion to \Sigma.

DaleSpam said:
It is certainly not standard, but you are obviously free to define "absolute" to mean "convenient for use in cosmology". I have no objection to the claim that the time coordinate in the FLRW metric is convenient for use in cosmology.
I have not defined "absolute" to mean "convenient for use in cosmology". My apologies if I used the term "absolute" in a confusing way above. All that I refer to is any given definition of simultaneity that is convenient for use in cosmology which is then heritable by a set of SR coordinate systems at any small region of spacetime within which absolute simultaneity holds by convention.

If it is not coordinate independent and has no physical significance then it sounds like another semantic argument...What happened in some other thread is irrelevant to the question of whether or not your argument here in this thread is purely semantic.
Are you dismissing the way that I used the term "absolute" to describe the definition of simultaneity in the FLRW metric, or are you dismissing my entire attempt to show a spatially homogeneous formulation of SR?
 
  • #35
Aether said:
My apologies if I used the term "absolute" in a confusing way above. All that I refer to is any given definition of simultaneity that is convenient for use in cosmology which is then heritable by a set of SR coordinate systems at any small region of spacetime within which absolute simultaneity holds by convention.
Definition or convention, calling it "absolute" is still just semantics. The point is that you are free to label the FLRW coordinates as "absolute" and Idjot is free to label the CMBR as "true", but neither choice has any physical significance. It is simply a matter of personal preference.

Aether said:
Are you dismissing the way that I used the term "absolute" to describe the definition of simultaneity in the FLRW metric
Yes. Since you are not using the term "absolute" in a standard manner your argument is semantic. I am not going to attempt to convince you to use the standard definition of "absolute" in order to promote clarity, but I am going to clearly point out that your use of the term is non-standard.
 
  • #36
DaleSpam said:
Definition or convention, calling it "absolute" is still just semantics. The point is that you are free to label the FLRW coordinates as "absolute" and Idjot is free to label the CMBR as "true", but neither choice has any physical significance. It is simply a matter of personal preference.
I don't intend to label the FLRW coordinates in a non-standard way, and have already withdrawn the term "absolute" in favor of "definition" with respect to the standard simultaneity of FLRW coordinates. I am now only using the term "absolute" in reference to the simultaneity convention of the non-standard (Mansouri-Sexl, LET, GGT, etc.) formulation of SR that I am using. I don't understand your continuing objection to how I am describing the FLRW coordinates.

Yes. Since you are not using the term "absolute" in a standard manner your argument is semantic. I am not going to attempt to convince you to use the standard definition of "absolute" in order to promote clarity, but I am going to clearly point out that your use of the term is non-standard.
Since I am no longer using the term "absolute" in reference to simultaneity in FLRW coordinates, I do not understand your continuing objection. What you seem to be objecting to as a semantic argument was unintentional at first, and then withdrawn/corrected. I do not understand what your continuing objection is.
 
  • #37
RandallB said:
Not sure using the CMBR as a spacecraft is the best analogy. I would rather use the SLS that generated the CBR as close enough to the single event of the Big Bang to be considered Simultaneous based on the SR Simultaneity rule that only local events can be truly Simultaneous.
It may lead to a similar result but for large scale measures I think it applies modern interpretations more directly.

That sounds like a good idea. Yet I have no knowledge of SLS. In fact I don't even know what SLS stands for. Please elaborate if you don't mind.
 
  • #38
DaleSpam said:
Definition or convention, calling it "absolute" is still just semantics. The point is that you are free to label the FLRW coordinates as "absolute" and Idjot is free to label the CMBR as "true", but neither choice has any physical significance. It is simply a matter of personal preference.

The personal preference is in an aesthetic label, but what that label is intended to represent, in my case, is a reference point that cannot be replaced with just anything. It's been reiterated a few times already that there is nothing in GR that says anyone frame should be preferred over any another. But for reference sake, wouldn't it be just plain easier to compare everything to one universal frame that everyone agrees is moving slower than anything else ever measured?

Humor me for a moment please...

Suppose the scientific community accepted CMBR or SLS(?) as the universal frame, calculating a universal time as I did at the beginning of this thread, possibly tweaked for accuracy. Then we compare all objects' velocities relative to this new universal frame. Then we find the time dilation of each object relative to the universal frame. Then we determine how many Earth years old the objects are but at their own rates of time elapse according to their dilation relative to the universal frame.

Anyone would have to agree that if there really was something truly at rest in the universe, that all moving objects would experience real time dilation, right? They, not the object at rest, would age more slowly, but at different rates according to velocity of course. But, with everything relative and nothing at rest, calculating time dilation would seem almost pointless.

Using a universal frame like CMBR would allow us to use time dilation for more than just aesthetics. It would allow us to use time dilation to determine the ages of celestial bodies more accurately. They are, after all, aging at their own respective rates with regard to their velocity, whether or not we have found the absolute. Just because GR fanatics refuse to say that one thing is moving faster than another without the word "relative" in the sentence, does not mean that one is not in fact moving faster than the other. It only means that GR tells us we have no way of knowing which is which. Using a universal frame like CMBR will allow us to reasonably decide which is which and that decision will lead to determinations that will at least be closer to determinations in an absolute than what we have now, which is basically nothing according to GR.

I agree that the word "true" has no physical significance. But in my opinion neither does "simultaneity". It's an unanswered question that's been accepted as an answer.
 
  • #39
Aether said:
Since I am no longer using the term "absolute" in reference to simultaneity in FLRW coordinates, I do not understand your continuing objection.
Sorry, I missed the retraction. I have no continuing objection, only continued posts on the original objection :smile:
 
  • #40
Idjot said:
Just because GR fanatics refuse to say that one thing is moving faster than another without the word "relative" in the sentence, does not mean that one is not in fact moving faster than the other.
Don't go there Idjot. Scientists are not fanatics.

Suppose the scientific community accepted CMBR or SLS(?) as the universal frame, calculating a universal time as I did at the beginning of this thread, possibly tweaked for accuracy.
SLS is "surface of last scattering" and that's what most of the photons of the CMBR last reflected off of, a few hundred thousand years after the big bang, so that's what we are actually looking at when we look at the CMBR. When you see something with your own eyes you are seeing photons that came from the Sun or from a light bulb usually, and they were reflected by some SLS...which is what you would say that you are looking at.
 
  • #41
DaleSpam said:
Sorry, I missed the retraction. I have no continuing objection, only continued posts on the original objection :smile:
Understandable, thank-you.
 
  • #42
Idjot said:
The personal preference is in an aesthetic label, but what that label is intended to represent, in my case, is a reference point that cannot be replaced with just anything.
Why not? All of the stuff you describe could be done just as well in any reference frame. Tell me, do you think that Greenwich Mean Time is in any sense "true" or "absolute"? Accepting the CMBR as a universal frame would be no more significant than accepting GMT as the coordinated universal time.

By the way, I believe that the scientific community already does something similar in the field of cosmology, which is the only field where this would be a useful convention.
 
  • #43
Aether said:
Don't go there Idjot. Scientists are not fanatics.

Aether,

One's occupation does not decide whether or not they are fanatical about something. A scientist could be fanatical about killing insects around his home. The plumber next door may be fanatical about GR. There is nothing in GR that says a scientist cannot be a fanatic and there is nothing in GR that says a GR fanatic has to be a scientist. :)
 
  • #44
Seriously though, no offense to anyone ever! This thread turned out to be more fun and interesting than I expected. But now I've given all of what little knowledge I had to offer beyond the idea itself and I think I'll leave it to the experts now and just read along to see what I can learn, before I offend any more scientists with my crudeness. Thanks again to everyone for all the input and advice.
 
  • #45
Idjot said:
The plumber next door may be fanatical about GR. There is nothing in GR that says a scientist cannot be a fanatic and there is nothing in GR that says a GR fanatic has to be a scientist. :)
You seem to have the attitude that since people can be flawed, science is probably flawed too. You really need to get onboard with how science works. Sure, a person can be fanatical, but real scientific theories do not have personalities. Whether the plumber next door is fanatical about GR or not has nothing to do with whether GR is correct. That attitude of yours is what generates attitude in the responses to your post.
 
  • #46
Idjot said:
But for reference sake, wouldn't it be just plain easier to compare everything to one universal frame that everyone agrees is moving slower than anything else ever measured?

But, as has been pointed out before, it's not true that "everyone agrees [the CMBR frame] is moving slower than anything else ever measured".

Idjot said:
Just because GR fanatics...

You are making an error. Calling people who do not make the same error "fanatics" is dangerously close to crackpottery.
 
  • #47
Idjot said:
Seriously though, no offense to anyone ever!
No offense? I guess you were just using a non-standard definition of "fanatic" too. :rolleyes: One that doesn't lump scientists (or plumbers) with terrorists.
 
  • #48
Idjot said:
That sounds like a good idea. Yet I have no knowledge of SLS. In fact I don't even know what SLS stands for. Please elaborate if you don't mind.
Idjot said:
That sounds like a good idea. Yet I have no knowledge of SLS. In fact I don't even know what SLS stands for. Please elaborate if you don't mind.
When thinking of the SLS (surface of last scattering) as the source of the CMB; remember it is not a physical surface of something.

It is a matter of the universe as it aged from the Big Bang less than 0.4 G-Years became transparent basically everywhere.
[EDIT :Oops – off by a few decimal places. SLS is about 377,000 years after the Big Bang which is less than 0.0004 G-Years after the Big Bang.]
From the view of the Local Matter then from which we are made now the light at some distant radius from it could not be seen until it traveled that distance plus the distance we covered in moving away from it (Hubble expansion); That defines a set source distance or “surface” for what we see today as CBR.
CBR from a closer radius has already passed us by, and from a greater radius will not be seen by us until sometime in the future.

The point is:
from our view about 14 G-Years later, and the Big Bang being a single event, and all SLS light from all areas or radiuses starting out at less than 0.4 G-Years from the Big Bang - we can define SLS light as having an “Absolute” Simultaneous start time.
 
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  • #49
RandallB said:
the Big Bang being a single event
Feel free to argue how a big bang singularity is an event in GR.

I do not think it is.
 
  • #50
russ_watters said:
You seem to have the attitude that since people can be flawed, science is probably flawed too. You really need to get onboard with how science works. Sure, a person can be fanatical, but real scientific theories do not have personalities. Whether the plumber next door is fanatical about GR or not has nothing to do with whether GR is correct. That attitude of yours is what generates attitude in the responses to your post.

I agree. Scientific theories do not have personalities and I shouldn't confuse them with the people who sleep with them printed on their pajamas. Haha I'm sorry. I couldn't help myself there. I know what you mean. It was a bad choice of word.

Vanadium 50 said:
.
You are making an error. Calling people who do not make the same error "fanatics" is dangerously close to crackpottery.

I agree. It did sound almost crackpottish.

DaleSpam said:
No offense? I guess you were just using a non-standard definition of "fanatic" too. :rolleyes: One that doesn't lump scientists (or plumbers) with terrorists.

:rolleyes: , :sigh:, :burp:, :fart:

Yes. A non-standard definition and one I shouldn't have used.


Listen up! I admit it! I used the word "fanatic" in exaggeration!

In reality I only think it's a bit stubborn to deny the usefulness of using CMBR as a universal frame because of simultaneity. I really don't think it's fanatical and it was rude of me to say that.

But you could lighten up a little. Scientists aren't drama queens either (joke).
 
  • #51
RandallB said:
When thinking of the SLS (surface of last scattering) as the source of the CMB; remember it is not a physical surface of something.
It is a matter of the universe as it aged from the Big Bang less than 0.4 G-Years became transparent basically everywhere. From the view of the Local Matter then from which we are made now the light at some distant radius from it could not be seen until it traveled that distance plus the distance we covered in moving away from it (Hubble expansion); That defines a set source distance or “surface” for what we see today as CBR.
CBR from a closer radius has already passed us by, and from a greater radius will not be seen by us until sometime in the future.

The point is:
from our view about 14 G-Years later, and the Big Bang being a single event, and all SLS light from all areas or radiuses starting out at less than 0.4 G-Years from the Big Bang - we can define SLS light as having an “Absolute” Simultaneous start time.

Thank you!
 
  • #54
MeJennifer said:
Feel free to argue how a big bang singularity is an event in GR.

I do not think it is.
Personally I don’t believe the idea of a singularity, naked or otherwise Big Bang or Black-Holes, although it is favored speculation.
Plus I don’t think anyone even speculates as to how to apply GR to whatever was there before or even a couple minutes after the Big Bang began.

But there is a wide agreement on much of what happened after the Big Bang as a single event.
For most the timing of when the universe became transparent is 370,000 to 380,000 years after the Big Bang whatever that event might have been.
Most of direct measure of the age of the universe as 13.7 Billion years, nearly 14 G-Years, comes from measuring the that SLS or CBR.
And on a scale of 14 G-Years compared to 0.0004 G-years the SLS or CBR source is effectively simultaneous with the Big Bang itself.
IMO all SLS observations should be considered as coming from simultaneous SLS source events.

I don’t think Astrophysics can make most of its claims about expansion and large distance measurements without taking the Big Bang and its aftermath within just a short Million years as being a single simultaneous event.
 
  • #55
Idjot said:
In reality I only think it's a bit stubborn to deny the usefulness of using CMBR as a universal frame
Please, don't misunderstand me. I am not denying its usefulness (at least for cosmology) as a convention. However your thread was about it as "true" time, not just its usefulness.

Using the CMBR as a universal reference frame would be akin to the international date line, or the fact that red lights mean "stop", or right handed coordinate systems. All of those are very useful conventions, but nothing would be fundamentally different if we had chosen and agreed upon different conventions.

If you had started your posts simply talking about the usefulness of the CMBR frame nobody would have objected. That is not what I was denying.
 
  • #56
DaleSpam said:
Using the CMBR as a universal reference frame would be akin to the international date line, or the fact that red lights mean "stop", or right handed coordinate systems. All of those are very useful conventions, but nothing would be fundamentally different if we had chosen and agreed upon different conventions.
I have to disagree,
picking a place for the dateline is an arbitrary choice we make from our POV to establish a useful convention. What other arbitrary choice can we make to serve as an equivalent but different perspective than what we get from the CBR? IMO there is nothing arbitrary about the CBR, it is a fact presented to us by nature. And if we are to believe our interpretation of nature as our universe having a single beginning with what we define as the Big Bang and the CBR as coming from the resulting SLS, it gives us as far as I know the only know instance of simultaneous events we can see form our local view that is “outside the box” of the SR- simultaneity rule.

That does not automatically say it will resolve to something as “Absolute” or “Universal”. But IMO it rates more than just thinking it was some arbitrary reference choice that we somehow had a hand in picking.
 
  • #57
RandallB said:
I have to disagree,
picking a place for the dateline is an arbitrary choice we make from our POV to establish a useful convention. What other arbitrary choice can we make to serve as an equivalent but different perspective than what we get from the CBR? IMO there is nothing arbitrary about the CBR, it is a fact presented to us by nature. And if we are to believe our interpretation of nature as our universe having a single beginning with what we define as the Big Bang and the CBR as coming from the resulting SLS, it gives us as far as I know the only know instance of simultaneous events we can see form our local view that is “outside the box” of the SR- simultaneity rule.

That does not automatically say it will resolve to something as “Absolute” or “Universal”. But IMO it rates more than just thinking it was some arbitrary reference choice that we somehow had a hand in picking.
Do you think that any of the laws of physics will be different in the CMBR frame than in any other frame? If not then it is an arbitrary convention.

Certainly, if you live near a mountain or some other prominent geographical feature it would be convenient to measure coordinates relative to that feature which is as you say "presented to us by nature". But that does not make any other choice less valid, nor does it make that choice any more fundamental. For the purposes of defining distances and times the CMBR is the cosomlogical equivalent of an easily identifiable landmark.

Defining the CMBR as "at rest" is every bit as arbitrary as defining the solar system, our local group, or some other object "presented to us by nature" to be at rest. Or as arbitrary as defining any of those things to be moving at some specific velocity.
 
  • #58
DaleSpam said:
Do you think that any of the laws of physics will be different in the CMBR frame than in any other frame? If not then it is an arbitrary convention.

Certainly, if you live near a mountain or some other prominent geographical feature it would be convenient to measure coordinates relative to that feature which is as you say "presented to us by nature". But that does not make any other choice less valid, nor does it make that choice any more fundamental. For the purposes of defining distances and times the CMBR is the cosomlogical equivalent of an easily identifiable landmark.

Defining the CMBR as "at rest" is every bit as arbitrary as defining the solar system, our local group, or some other object "presented to us by nature" to be at rest. Or as arbitrary as defining any of those things to be moving at some specific velocity.
I do not think how we understand Physics and the Laws that define it is “Complete” (if they were we would have unification forces and QM & GR). So, yes I think CBR might yet be a part of changes some of what we think we know. What and how exactly some law may change is speculation at this level, it is just my opinion the CBR could contribute more to helping complete our understanding of physics.

I understand picking one mountain as a reference point over a second, third, or other mountain option certainly cannot be thought of as a fundamental reference point.
But certainly, Astrophysics seems to regard the CBR as fundamental, and I’ve yet to see anyone point out a second option for the fundamental reference CBR provides them. Thus I find no grounds to support claiming their using it as fundamental was in fact an arbitrary choice.

Unless you include a completely different interpretation of, or completely reject, how they interpret the Big Bang; I don’t see where you can justify these fundamental assumptions of Astrophysics as being arbitrary.
But, you are entitled to your opinion. We just have differences here.
 
  • #59
Is GR not the fundamental theory accepted by the Astrophysics/Cosmology community? If so then you are incorrect to claim that they regard the reference frame of the CMBR as fundamental. According to GR the rest frame of the CMBR is no different than a reference frame where it is moving at some arbitrary velocity.
 
  • #60
DaleSpam said:
Is GR not the fundamental theory accepted by the Astrophysics/Cosmology community? If so then you are incorrect to claim that they regard the reference frame of the CMBR as fundamental. According to GR the rest frame of the CMBR is no different than a reference frame where it is moving at some arbitrary velocity.
I would not call GR exclusively “THE FUNDAMENTAL THEORY” of Astrophysics/Cosmology. Just one of the fundamental theories Astrophysics/Cosmology uses. Much of the conclusions drawn by them depends on the chemistry in space which is based on the Standard Model and therefore the fundamental theory of QM. Meaning it accepts working with two theories that are fundamentally incompatible.

Now a significant part of what the Astrophysics/Cosmology community tells us about the history of our reality, especially as it relates to the sequence of events following the Big Bang up to when stars first began to form, is fundamentally based on the Big Bang including how that unique point of view cannot be replace by any arbitrarily chosen frame of reference.
To the extent that means they may well be working with three fundamental theories (by adding Big Bang CMR as something new) each in some respect incompatible with the others that is OK by me.

IMO your opinion requires rejecting the proposed reactions, interactions and formation of fundamental particles like quarks proceeding to the formation neutrons, protons, etc as not plausible.
Although that theory of fundamental particle and force development may not by 100% on the mark and complete; I consider to be largely correct and take to be very plausible. Thus I cannot reject the Big Bang or the uniqueness of a fundamental SLS benchmark as used in Astrophysics/Cosmology.

That remains my opinion. To the extend you can minimize the value of the Big Bang and the early history implied by it we just have different opinions. I only ask you give mine sincere consideration before rejecting it. However, unless you have something additional to offer to support it, I cannot adopt yours.
 

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