You must remember that the more objects there are out there, the more space there is for all the dark matter to hide in.![]()
I think that MM and Geemack have shown they dislike each other now to have a successful marriage.
http://www.nytimes.com/2008/05/17/science/space/17univ.html
http://www.jpl.nasa.gov/news/features.cfm?feature=2287
It's extremely hard for me as a skeptic to believe that you already know with any *PRECISION* how much ordinary matter is "out there" when I read these sorts of articles.
The second link goes to an empty page.
For decades, astronomers have gone about their business of studying the cosmos with the assumption that stars of certain sizes form in certain quantities. Like grocery stores selling melons alone, and blueberries in bags of dozens or more, the universe was thought to create stars in specific bundles. In other words, the proportion of small to big stars was thought to be fixed. For every star 20 or more times as massive as the sun, for example, there should be 500 stars with the sun's mass or less.
This belief, based on years of research, has been tipped on its side with new data from NASA's Galaxy Evolution Explorer. The ultraviolet telescope has found proof that small stars come in even bigger bundles than previously believed; for example, in some places in the cosmos, about 2,000 low-mass stars may form for each massive star. The little stars were there all along but masked by massive, brighter stars.
"What this paper is showing is that some of the standard assumptions that we've had - that the brightest stars tell you about the whole population of stars - this doesn't seem to work, at least not in a constant way," said Gerhardt R. Meurer, principal investigator on the study and a research scientist at Johns Hopkins University, Baltimore, Md.
You don't seem to know what empirical means.The *math* isn't the problem! *Physics* is the problem, specifically your inability to physically and empirically link "acceleration" and "dark energy". A universe full of math's won't fix that problem.
Well the Friedmann equations only give one static solution. And that is unstable.Why? I simply see PC theory as the mixture of plasma physics and GR. Why is GR a problem for PC theory?
The cosmological constant isn't stuffing anything into GR. Its already there.What makes you think it's "ok" to stuff "dark" anything into a GR formula?
And yet we observe missing mass in the large galaxies like our own and Andromeda. This should tell you something."Especially in these galaxies that seem small and piddling, there can be a lot more mass in lower mass stars than we had previously expected from what we could see from the brightest, youngest stars,"
The thing is, even if predications were off by a factor of 10 or more, it still would produce nearly enough mass.
How odd. Both yours and Michael's link give me a blank page on firefox but if I copy and paste in to Opera it works.
Well, that depends. If the star count is off, so is the plasma flow FROM each star. It's not just the star count that is *WAY* off, it's the mass in the form of plasma *AROUND* each star is is also off by a factor of ten, the neutrino flows, the high energy particles, etc. If the star count is off by a whole OOM, then the entire mass estimate could be off by similar amounts.
You don't seem to know what empirical means.
Well the Friedmann equations only give one static solution. And that is unstable.
The cosmological constant isn't stuffing anything into GR. Its already there.
Well no. The distribution of stars doesn't match the distribution of mass required to produce the observed rotation curves.
Not at all. I explained which parts I specifically reject on empirical grounds which does not include any of the lensing data by the way.
Yes, ignore data that most explicitly shows you are wrong. Great job! Not that the other data supports you either, mind you, it's just more complicated to explain.
You are essentially acting like a conspiracy theorist here by assuming all of physics is secretly trying to NOT describe how the Universe works on cosmological scales and every physicist that even remotely studies it is in on the conspiracy. Further, you are arguing this conspiracy began spontaneously without any need for them to communicate with each other about it and they all just dropped all efforts to try to describe the universe. No offense, but it is a rather insane proposition.
You see how "neutral gasses/plasma" might react because that is all they are really looking for. That study would suggest that the bulk of the "missing mass" is found in the galaxy infrastructure (stars, arms, etc) of the galaxy, not in the plasmas around them.
What we see is that the bulk of the matter is not affected by electromagnetism, otherwise the collision would heat up the gasses inside, around, etc. In fact, we see that the bulk of the mass doesn't correlate to the behavior of gas OR stars.
That's congruent with those two articles I posted earlier by the way that suggests that the mainstream *SERIOUSLY* underestimates the star count in distant galaxies.
It doesn't state they "seriously" underestimate it.
How so? We can only 'see' light from one large start in every 2000 or so small stars in a galaxy. We can "assume" that due to the distance between stars in a galaxy (light years), the likelihood of a "direct hit" is pretty small. We might then "assume" most of the stellar infrastructure should "pass on through' the "collisions' processes, and only interstellar plasmas are likely to 'collide'.
In the bullet cluster, if the little stars didn't stick with the big stars, then the big stars couldn't cover them up anymore and we'd see them.
How about dealing with those two articles I just posted for Ben.
Those show that the inaccuracy that exists isn't remotely close enough to account for the gravitational effects we observe.
Well, that depends. If the star count is off, so is the plasma flow FROM each star. It's not just the star count that is *WAY* off, it's the mass in the form of plasma *AROUND* each star is is also off by a factor of ten, the neutrino flows, the high energy particles, etc. If the star count is off by a whole OOM, then the entire mass estimate could be off by similar amounts.
Originally Posted by Michael MozinaOriginally Posted by Tubbythin
You don't seem to know what empirical means.
It's stuff that shows up in controlled experimentation, like "current flow". Note that "current flows" have a known, tangible and physically demonstrated effect on plasmas, gasses, etc. Compare and contrast that to the dark energy thingy that *NEVER* shows up in controlled experimentation, and nobody can even tell us where to go to get some.
Yes, ignore data that most explicitly shows you are wrong.
You are essentially acting like a conspiracy theorist here by assuming all of physics is secretly trying to NOT describe how the Universe works on cosmological scales and every physicist that even remotely studies it is in on the conspiracy.
Further, you are arguing this conspiracy began spontaneously without any need for them to communicate with each other about it and they all just dropped all efforts to try to describe the universe. No offense, but it is a rather insane proposition.
What we see is that the bulk of the matter is not affected by electromagnetism, otherwise the collision would heat up the gasses inside, around, etc. In fact, we see that the bulk of the mass doesn't correlate to the behavior of gas OR stars.
Those show that the inaccuracy that exists isn't remotely close enough to account for the gravitational effects we observe.
So careful, controlled, consistent and checkable observation isn't empirical science?
It is precisely because we understand the properties of plasmas so well that we can rule plasma effects out. What is so difficult to understand about that?It's stuff that shows up in controlled experimentation, like "current flow". Note that "current flows" have a known, tangible and physically demonstrated effect on plasmas, gasses, etc.
Empirical data from controlled experiments has been analysed that shows that the Universe is expanding at an increasing rate. A subset of solutions to this controlled set of observations are referred to as "dark energy". These solutions are consistent with GR.Compare and contrast that to the dark energy thingy that *NEVER* shows up in controlled experimentation, and nobody can even tell us where to go to get some.
Nobody except you is stuffing metaphysics in to GR.This whole 'let's stuff metaphysics into GR" game is a bunch of baloney.
No I don't. Dark energy is the simplest solution that matches empirical observations. So until someone comes up with a better solution or falsifies it, it will be treated by most as the leading explanation.You need to *physically, empirically* demonstrate that "dark energy" has any physical, empirical effect on objects with mass in a controlled experiment.
Like I said, nobody is talking metaphysics except you.Then and only then will I let you point at the sky and claim your dark energy god did it.
I'm not. That was your straw man.Sure it's there. That doesn't mean you can stuff "magic" or "God" into it.
See above. You're just repeating yourself. I've got better things to do with my life.Show me *empirically* that "dark energy" has an effect on mass and *THEN* I'll be happy to let you stuff it into a GR formula and maybe even into an MHD formula if you like.
To be honest, I couldn't actually care what you lack belief in.Until you show me it's not a figment of your collective imagination, I "lack belief" it should be stuffed into *ANY* mathematical formula.