Yup. We agree there.
Hardly - GR itself predicts that the universe will expand.
Technically, with a zero constant it predicts expansion *or* contraction. GR in that configuration (zero constant) doesn't necessarily predict a static universe in and of itself. The only reason Einstein tinkered with a non zero constant for awhile was to explain a *static* universe. Once he believed that the universe was expanding, he set the constant back to zero, and claimed the whole concept of a non zero constant was his "greatest blunder".
Objects in motion stay in motion and that motion can explain a simple expansion phenomenon. I hardly need exotic claims to explain an expanding universe.
The only way you can have a static universe is to "stuff" a constant in there holding it from expanding...
Or it keeps it from contracting. The thing is david, something quite "ordinary", say an ordinary EM field from cathode suns, or external current might explain a "stable" universe. Again, nothing particularly 'exotic' needs to exist in nature to explain even a static universe scenario.
You can also put a constant in there to note the idea of an accelerated expansion, as evidenced by the time dilation of type Ia supernovae and baryon acoustic oscillation measurements.
I haven't heard you "explain" those curves or any of your claims yet related to "normal" and "exotic" matter, and acoustic oscillations yet, so I'll have to reserve judgement on that claim for the time being. The "signal broadening" that you're calling "time dilation" is in fact "predicted" in some "new tired light" theories, and apparently even some VP oriented papers. The "theme" seems to be that something 'holds onto' the photon for awhile, yet doesn't change it's trajectory in that "holding" process.
Now of course simple laser experiments go a long way to demonstrating much the same thing:
Prof. Lene Hau: Stopping light cold - YouTube
This is all part of extending a hypothesis. You are welcome to explain those two observations in other ways, but we're equally allowed to check the internal consistencies of those ways.
You're asking me to let you extend GR theory with "magic", without even demonstrating that magic exists, or that it has any effect on matter. Why would you expect me to let you do that?
In what way is the cosmological constant you require to maintain a static universe in GR different to the cosmological constant term for a theorized accelerated expansion of the universe, our explanation of the otherwise unexplained time dilation of the light curves of type Ia supernovae?
My constant actually exists in nature (EM fields), and it has a tangible effect on plasma. Yours doesn't.
Once again, you are attacking the notion of hypothesis itself. If the niverse is expanding.
[astro-ph/0601171] Is space really expanding? A counterexample
Actually, no I'm not. I'm fine with an expanding universe as described in that paper, and as described as objects in motion. You're not talking about basic expansion, you're talking about something very different than simply the movement of objects.
There is no 'qualification' problem.
That is *exactly* like me claiming that there is no qualification problem with stuffing "God energy" into a GR formula, or "magic energy" into a GR formula. If you cannot demonstrate your claim that it even belongs in a GR formula to start with, why should I let you simply "fudge" the whole qualification process? I didn't simply "make up" EM fields to use as a non zero constant, whereas you simply 'made up' a new force of nature and called it "dark energy".
The only problem is showing that there are no other explanations for what is going on, whilst also extrapolating predictions of our model and seeing if they're consistent.
To show that there are no other explanations would require *extensive* laboratory testing on the scale and sophistication of the Harvard study. That takes *big money*, which I don't have to spend thanks to your invisible entities that have no business even being in a GR formula in the first place!
For example, if the CMB power spectrum from Planck had been substantially different, there might have been a major issue.
Why? It wasn't a "major issue" for you when the Planck data didn't jive with your theory as it relates to the two hemispheres. You seem to be able to "tweak and bend" your herd of metaphysical entities to achieve a very *wide variety* of different configurations. Just because you might not be able to dream up a way to "work around the problem", doesn't mean that *nobody* can come up with a way to "fix it".
I really see no logical way to falsify these claims since they are "adjusted on the fly" as necessary.
You are essentially saying that it is impossible to hypothesize any solution to any problem because until you prove the hypothesis true, you have no "qualification" (this is still a really odd way to phrase it btw).
No, not at all. Were you stuffing an EM field into that non zero constant, you wouldn't hear me cry metaphysical foul. It you put *any known force of nature* into that non zero constant, I'd be fine. It's the fact that you *made up* a *brand spanking new* force of nature, *just to make one cosmology theory work right* that I object to.
We're saying there was a murderer, but we don't know who it is. Your objection is essentially - how do you know there was a murderer?
In this case there's no evidence that a murder was even committed in the first place because there is no actual physical knife, no demonstration that your "invisible knife" has any effect on a body, and there is no body!
Redshift *is* caused by inelastic scattering. There's no logical way to ignore the fact that it's going to occur in space. Redshift is also due to the movement of objects and again, you can't be sure it's not a "combo deal" to begin with!
You apparently see something in the sky. You *assume* there's been a murder. You're apparently happy to rule out the usual suspects with nothing more than 6 lines of math, and one published paper from 1929 written by a guy with a completely *self serving motive* that only discussed a *few* types of inelastic scattering and never tested any of them personally.
The answer is - we don't, but the alternatives seem highly unlikely since there's no evidence of any kitchens exploding nearby. You have no evidence of anything that could produce anything LIKE the cosmological redshift - none whatsoever.
That's simply false IMO. You wouldn't know if inelastic scattering in *various conditions* would or would not produce cosmological redshift because you've never done the kinds of *extensive experimentation* required to demonstrate such a claim. You apparently expect me to accept exactly 1 published paper from 1929, and your personal six lines of *unpublished* math?
You have evidence of things that are vaguely related
They are not "vaguely" related at all, they are *directly* related to photon redshift. In fact, the movement of objects produces effects *identical* to your mythical type of "space expansion". You guys even keep trying to ride the coattails of Doppler shift!
Inelastic scattering also produces *photons redshift* and there are *many kinds* of inelastic scattering, not just one.
- but they have all the wrong characteristics...notably wavelength dependance -
Again however, you wouldn't really know that because you haven't really tried them all out yet in the first place, certainly not in a lab, not with lots of variations in temperature, density and EM field characteristics in the plasma.
and the additional burden that all of them you've suggested to date would be dispersive,
The universe *is* dispersive of light!
along with the fact that quantum mechanics clearly shows that ANY such mechanism would be dispersive, VPs included.
That last paper I cited on VP's suggested that the VP's slowed down light but *did not* change it's trajectory. Those Harvard experiments would tend to support the idea that the speed of light can *vary* depending on the conditions of the medium. You can't just *assume* things based on six lines of math, you have to *experiment in the lab* to determine these things. Chen did that. You pretty much handwaved it away claiming that it was wavelength dependent without so much as a single test of concept *in the lab*.
So, either you have to establish a new branch of quantum mechanics that corrects simple conservation of energy math, or you have to overturn quantum mechanics altogether.
I don't necessarily need to do either of those things until I get into a lab and verify these things in *real life experiments*. Until then you're just making bold claims *about* QM that have no basis in demonstrated fact.
Since QM is empirically well-tested....well, you can hardly claim the empirical position.
QM experiments with inelastic scattering *support* the claim that photons *are* affected by the medium in which they traverse. You're not going to get the high ground via QM.
No, it's the speed limit of information. Important difference.
No, actually GR and SR say something quite different, and this is where relativity gets really, really hard to understand, but it's quite logical....
To determine their speed relative to each other - which would seem at first glance to be 2C - you actually use this formula:
v_rel = (v_1 + v_2) / (1 + (v_1)(v_2)/c²)
So...in fact, if they are travelling at C and they pass each other:
v_rel = (c + c) divided by (1 + c times c / c squared)
thus v_rel = 2c / 2 = ...oh my god, C!
So to each object travelling at C - photons say, their relative speed would always be C. This is what we mean when we say photons travel null geodesics. They aren't billiard balls. Stuff gets real weird once you get close to C.
Things travelling at C always appear to travel at C. If you were to repeat the calculation and have two particles moving past each other at 99% of C, their relative velocity would be 99.9949% of C....not 198% of C.
Mind boggling, huh?
I'll let you read through that expansion paper and see if that's what you mean.
What I'm saying with relativity however is that superluminal expansion of space-time itself does NOT violate SR or GR because C by definition only applies to information moving through space-time.
You haven't demonstrated that it happens any other way!
It does not apply to space-time itself, because space-time is not information.
Huh? "Spacetime" *is inclusive*, not exclusive of photons and mass. It's *completely informational*. You're not talking about a "moving object" sort of expansion anymore, you're describing a *mythical* form of expansion that again lacks any sort of *qualification* on your part.
The coordinates themselves can expand
How? How does that *physically* happen?
Again, from my skeptical perspective, you're pretty much handwaving away, claiming that the only way to explain photon redshift is via 'magical' extensions to GR theory. I'm sorry but I simply don't buy that idea, particularly since your *entire* claim seems to be based on *one* published paper from 1929, and your own personal *unpublished* handwaves!