Hi origin,
I don't believe you actually want any sort of answer you appear to just want to troll, but on the off hand that you do want to discuss this I will try.
What you do or don't believe is of no concern to anyone, especially me, since I wanted from the first to engage on the science and question both the rhetoric and the facile 'explanations'.
Oh origin, where does one begin?
You've got so many things misconstrued that it's probably just as well you finally decided to actually engage instead of evade and preconclude that the 'other guy must be wrong' because you THINK you have the answers already. Let's see....
First the term recession velocity seems to be confusing you. It is a confusing term. Recession velocity is not a real velocity because there is no movement through space it is due to the expansion of space between 2 distant ojects. The red shift in the light is not due to the relative velocity between the 2 objects. The red shift is due to the expanding space stretching the photons as they propagate through space.
I have NEVER confused the alleged universal 'recession velocity'. That was why I challenged the usual 'confusion' brought by your kind of facile 'explanation'. Because I ALREADY know there is NO FTL TROUGH-SPACE motion.
We hear 'resident experts' here and other sites say things like "expanding space taking the galaxies ALONG WITH that space, so no faster than light velocities are involved".
So I ask them to explain the mechanism
which couples those far distant galaxies TO that expanding space so as to produce the "take galaxies along with that expanding space".
Then they come back with a 'revised explanation' saying that there is NOT EXPANDING space but JUST MORE space which is somehow supposed to STRETCH out photon wavelengths along with the stratching of that expanding space.
So they came full circle back to 'expanding' space, and THEN ADD the PHOTON STRETCHING 'explanation' to boot!
So I then naturally and logically ask them to explain:
- just HOW that space is manifest between those galaxies to give the 'universal recession' component effect of 'redshift' IF those galaxies have not MOVED AWAY other than their usual proper motion which they would have if space had remained 'unchanged' or 'flat'; and...
- HOW does the 'space' (expanding or otherwise) affect the photon wavelength if they also maintain elsewhere that "space is just pure geometry-distance and so not involved in any interactions WITH a photon since the photon is just moving along a NULL geodesic at all times through that space?
Then they AGAIN come back with that EXPANDING SPACE 'explanation' (which they only just 'revised' to say "just MORE" space, remember?), and say that the photon is stretched by that expanding space between the far source galaxy and our detector here.
Now THAT is the sort of 'resident expert' CONFUSION and circuitous and 'changing goal posts' so-called 'explanations' that I wish you or any other 'resident expert' to address and clear up once and for all. Unreasonable ask?
And I ask you to be cognizant that the universal recession redshift effect is attributed to the different local states between the far source and the local detector.
If you have any doubt about that, please feel free to argue that with waitedavid137 over at physforum, and he will give you all the professional references/interpretations you wish.
Which means that YOUR above repetition of that 'facile explanation' about the 'expanding space' and 'stretching photons' etc etc is just pure hogwash not fit to be considered, let alone offered as an 'explanation' in a science forum.
You have asked the question, 'Why don't the galaxies move with space'. This doesn't really make any sense. Lets use the earth as an example. A good approximate value for the expansion is 74 km/sec/Mpc. So the universe around us is expanding, at the earth there is no detectable addition of space, at a radius of 1/2 Mpc space is being added at a rate of 37 Km/sec, at a radius of 1 Mpc space is being added at a rate of 74 Km/sec and at a radius of 2 Mpc space is being added at a rate of 148 Km/sec. So all around us space is expanding. We are simply observing the space around us iniformly expanding outward. So of course we are not moving through space due to the expansion. Where would we move and why would we move through space due to this uniform expansion around us?
NO. NO. NO. You got that wrong too. I
never asked that! That is your misconstruing because either
don't pay attention OR read with biased preconclusions of your own.
I asked for the coupling mechanism for THEIR facile 'explanation' about 'galaxies being taken along' WITH so-called 'expanding space' which THEY claim, NOT ME. Get that straight?
No wonder it doesn't make sense, because I DID NOT claim that NOR did I ask that. It is your misunderstanding and the nonsense is in your 'expanding space' and 'stretching photons' and etc etc. so-called 'explanations'....which makes the rest of your above paragraph irrelevant because it does NOT ADDRESS what I actually asked as a direct consequence of those nonsense 'explanations' repeated so glibly and unthinkingly by you and other the 'resident experts' here and elsewhere.
Re-read my previous paragraph and you will see why your and others' such 'explanations' are NOTHING OF THE KIND; which is why I ask these questions to get some real explanation IF they have any that is actually CONSISTENT and not circuitous and confusing to THEMSELVES as well as to the readers of same. Thanks.
The concept of geodesics is not something that I have worked with. You keep asking for SR to explain expanding space geodesics, but I think the geodesic for expansion is in the relm of GR not SR. Like I said this is a bit over my head but I think this site will have the information that you are requesting.
Expanding universe and General Relativity
Obviously it's much too much over your head, else you would not just go round repeating and parroting such 'facile' nd self-confounding 'explanations' which fly in the face of counter-evidence that space does NOT 'stretch' photons, nor do galaxies couple to the local space for them to be taken along with them in any way whatsoever because space i s not 'expanding' nor is there 'just more of it' , nor any other rationalization tried so far to make sense of the confused understanding of what the universal redshift effect actually IS.
The SR/GR distinction is a furphy, because irrespective of what you invoke, there is NO consistent professional 'explanation' no mattr what tack you take; 'expanding space'; 'just more space' or; 'space stretching photons' and 'null geodesics' which go nowhere and yet there is redshift EVEN THOUGH SPACE CANNOT 'stretch' photons to effect any redshift UNLESS the galaxies themselves are moving WITH space...but that is not possible UNLESS you provide the coupling mechanism, which is not there. And if it IS there, then you have to explain what the geodesics are and where the galaxies are moving IF NOT FASTER THAN LIGHT through space.
See, origin? I has very good and cogent reasons for wanting further clarification of such facile and OBVIOUSLY SELF-CONFOUNDED so-called 'explanations' being trotted out as if they were anything of the kind.
I trust you now realize that "There is more in heaven and earth that is dreamt of in your philosophy" in some areas of science/understanding. Which is why you would do well if in future you took me seriously and actually took the trouble to actually understand the SUBTLE NUANCES which my questions/challenges treat when asking those who blithely trot out facile and self-confounded orthodox 'explanations' to THINK AGAIN after you consider my questions for a while WITHOUT kneejerking and insulting becuase of your own UN-EXAMINED 'understandings' being not quite all there, as I have pointed out.
So, take a long break from trolling and insulting and kneeherking and ego-preening and drive-by cheap shots, and just RE-THINK about those things I have questioned/hypothesized about since I joined. You could do a lot worse, because so far you and others have nothing to offer explorations of the status quo which I and others are BOUND by the demands of SCIENCE and LOGIC to TEST and ask for clarification where indicated.
That is all I am here for; no more, no less; hence my moniker: RealityCheck.
PS: To whom it may concern: I am again having soon to withdraw from internet discourse in order to again concentrate my time to finalizing my TOE from scratch. So if I soon disappear for a few weeks and do not get to reply to any particular post, please don't take it amiss. Cheers and good luck and good thinking to you all!