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    Dark Matter Gets Darker: New Measurements Confound Scientists

     
    • Daniel  •  Louisville, United States  •  7 mths ago
      For roughly two centuries, Newton reigned supreme, and his theory of gravity was used to make many astounding predictions (such as the existence and location of Neptune). It also made false predictions (couldn't explain the precession of Mercury, so a nonexistent inner planet was posited--the Newtonian step analogous to the invention of "dark matter"). Eventually we realized that Newton's law of gravity was--gasp!--wrong. Now we have invented a whole unseen world to try to hold on to Einstein's theories. Perhaps it is time to admit that this is the wrong approach. Einstein, like Newton, was brilliant and gave us a closer approximation than Newton had given. But it is an approximation only. Science is supposed to accept the simplest explanation. Is dark matter really the simplest we can come up with? An entire unseen universe of matter is simpler than saying Einstein wasn't completely right?
      • Mogwai616 7 mths ago
        So, when you look out the window do you see gamma rays, ultra-violet rays, infra-red red rays, x-rays, nuclear radiation, neutrino's etc.?

        Maybe we should have assumed these didn't exist because we couldn't see them? An entire unseen universe of matter is simpler than telling the potential discoverers they weren't completely right?

        Yeah, I think your theory is flawed.
      • Daniel 7 mths ago
        Your analogy is flawed. Most of the radiation types you describe follow the same laws as visible light and are not the invention of new, invisible, undetectable substances with unknown properties. Dark matter, thus far, is no more logical than the nonexistent planet that was meant to save Newton's gravity...less logical, in fact, since at least that planet had predictable properties. Dark matter is, so far, little more than little invisible fairies with gravitational mass--and those fairies are supposed to make up the majority of all matter.
      • Sean 7 mths ago
        In both cases however, the incorrect model served to further our understanding. Yes it was proven wrong in the end, but it also fit the data we had at the time, and provided a framework to work around. The mystery planet and dark matter are not steps backward, but rather an incomplete idea. It will (like Newtonian physics) eventually evolve into a more complete understanding. And science does not always accept the simplest answer. A simple answer is not automatically the right one.

        At the end of the day, we still cannot account for 98% of the mass we otherwise believe should be there. Now we simply know that it does not distribute like we thought it did.
    • S.C.  •  7 mths ago
      Dark matter is the 21st century version of the aether theory. Eventually they'll whittle away at what dark matter does until there ceases to be any dark matter category, as everything will have been defined as something else.
      • Mogwai616 7 mths ago
        I wonder why the worlds leading physicists don't believe that? Could it be "knowledge."
      • Hesperos 7 mths ago
        SC: Yes exactly. I was trying to think of the word.
    • ken w  •  Indianapolis, United States  •  7 mths ago
      these dwarf galaxies behave differently because there is no massive black hole at their center...just a guess...that's why they are dwarf galaxies...not enough gravity to pull in huge amounts of matter to create a full sized galaxy...anyone care to comment or enlighten me on an uneducated guess??
      • michael 7 mths ago
        Depending on the angle of the galasy to earth we should be able to detect the black hole from the matter disk surrounding it. As far as I know nobody has commented on the subject.
      • Arbutus Dave 7 mths ago
        My guess is that the black hole is there, but perhaps smaller.
      • A Yahoo! User 7 mths ago
        I must say,this is the first time on yahoo,I found no hate,no stupidity,none of the general intellectual decay that manifests itself so frequently here. Refreshing....thank you!
    • Richard G  •  7 mths ago
      Brans–Dicke theory may come out the winner here. I like the fact it takes into account volume. And I would love to see a computer model based on a rapidly decreasing volume. I have seen a few parers out there. Not a lot. And several Physics forums that will not even consider Albert was wrong. But there are enough anomalies out there now to at least try to see if this alternative theory can explain them.
    • DavidS  •  7 mths ago
      Calling it dark matter/energy is just a nice way of saying that we see the gravitational effects of a whole lot of something out there and we really have no idea what it is.

      It's a technique scientists use to explain what they cannot yet explain. Kind of like the term "black box" used to describe phenomena where scientists see an input and an output but cannot come up with an explanation for what happens in between. They could have used the term "magic" and had the equivalent meaning but they didn't like the connotations of that term.
      • Glowby 7 mths ago
        "we really have no idea what it is."
        Why would you say that, when the article states their ideas of what it is?
        IMO, you completely failed to make your point.
      • DavidS 7 mths ago
        Yes, the article does suggest some of the notions but from a scientific standpoint they hardly even qualify as educated guesses. "Exotic particles"? I mean really now......
      • Arbutus Dave 7 mths ago
        I dunno. The dark matter/energy hypotheses are presented MUCH too forcefully for my tastes.
    • Beep  •  7 mths ago
      New Headline: Dark Matter leaves scientists in the dark.
    • HenryC  •  Birmingham, United States  •  7 mths ago
      What are the gravitational effects of virtual particles or quantum fluctuations. What effect does gravitation warping of space have on the production of virtual particles.
      • AL 7 mths ago
        it is 1/2 Imaginary neg 1/2Im IS Plancks constant. so that quanta is half Imaginary its like "Quick the Future is coming, better throw some Imagination on that", and that's what the Future is: Your 2, yet 1/2 IM to Their Matrix in Now, your Mind is from NOW, that you all are connected to, like how Jefferson's copier works.The real equation is Picksets,Energy by Time, or Et, so Et=(mc2)=(HV=hv), with hv=the square root of 1/2mass/divided by C, and HV=sameo so ,1mc=hv and 1HV=1mc see no missing Mass, so Dark Matter is a Nothing filler, like zero is as space holder..
    • R  •  7 mths ago
      The stupid on Yahoo! It burns. Folks, this is very interesting stuff. We could be talking about an entirely new form of matter. And for those of you saying that the scientists are idiots, answer this:

      A planet half the mass of Earth is halfway between Earth and the Sun in a circular orbit about the sun. What is its period of rotation about the Sun?

      If you can't answer that, you are too stupid to speculate about dark matter.
    • Qwickdraw  •  7 mths ago
      "The model envisions dark matter made up of cold, slow-moving exotic particles that clump together because of gravity."

      I don’t know why they have to believe it to be exotic particles. It makes more sense that dark matter is normal atoms like hydrogen and helium but in a much less dense version that is mostly invisible due to its density like looking through a glass. As it is attracted into the center of a galaxy it would become part of all the stars/black holes and nebula making it virtually non-existent in the center regions. Perhaps the mass of these a light atom does not agree with their model, dunno.
    • z  •  7 mths ago
      The jury is still out. Disregarding gravitational lensing for the moment, there may another reason stars in spiral galaxies mostly rotate around the galactic center at the same speed;
      inertial distribution of rotational mass throughout the galaxy by gravity. Think spokes on a bicycle wheel. The same would apply to clusters. The same would not apply to globular clusters with little rotational coherence.

      Another concern to consider:
      There are some galaxies whose velocity profile indicates an absence of dark matter, such as NGC 3379. There is evidence that there are 10 to 100 times fewer small galaxies than permitted by what the dark matter theory of galaxy formation predicts. This is known as the dwarf galaxy problem.
    • Terry M  •  Montgomery, United States  •  7 mths ago
      Has anyone ever stopped to consider that maybe the reason we are unable to see this "dark matter" is that the only reason we can not see it is because it is in another dimension or some other form of matter that our senses are unable to detect. It has been shown that many things that have been written in science fiction turn out to be reality. Maybe the possibility that the "missing matter" in stead of "dark matter" is really there and has been all along.
    • Dexman'  •  6 mths ago
      "There are more things in heaven and earth, than in your wildest imagination, my dear Horacio."
    • mrhllc  •  6 mths ago
      Just as Newtonian mechanics and Relativity cannot accurately describe the very small in the quantum mechanical world, perhaps it is time to develop a different mathematical model for the very. Then maybe they can quit trying to force fit the math with conjured unseen items such as dark matter.
    • DavidS  •  7 mths ago
      Perhaps our detection of the effects we attribute to dark matter & energy are actually measurements attributable to the existence of matter/energy in other dimensions.

      How many of you have ever read the famous book "Flatland" written in 1884 by Edwin Abbott? It describes the difficulties which would be presented to beings living in two dimensions trying to detect three dimensional beings.

      Perhaps dark matter/energy are the manifestations of higher dimensional realities? There are a lot of experiences written off to religious & mystical fervor that actually might be examples of people in altered states of consciousness that would allow them to detect higher dimensional realities. There are many examples of these types of experiences which are not readily written off as experiences of delusion. Perhaps we are detecting physical manifestations of what these mystics have experienced? It could explain a lot of what mystics throughout the ages have been referring to.
    • WarmongeR  •  San Francisco, United States  •  7 mths ago
      i used to think that Dark Matter is the politically correct name for Black Holes. Seems like im right all along.
    • Dennis  •  Atlanta, United States  •  7 mths ago
      If astronauts took a jar scooped up dark matter and returned it to earth would we see
      substance in the jar?
    • Solar Child  •  7 mths ago
      Question now becomes...what normal matter lays at the centers of the two dwarf gallaxies? What structures does the matter occur in? How does this compare with those used to establish the standard model? The standard model gallaxies would establish and exhibit a "mean" measure of normal matter constituent materials given highly similar galaxy structural dynamics.
      Here, what is significant is that in determining the standard only galaxies that possess and very
      high correlation in structure can be used. Why? Because you want to eliminate Mass-structure
      as being a variable in what may be affecting dark energy. Just by reading what is written in this
      article it appears that dark energy is "density sensitive". That is dark energy is attracted to regions where matter is more greatly concentrated or to a region where regular matter has
      achieved a specific density threshold.
    • ProdigalSon316  •  Bay City, United States  •  7 mths ago
      Dark matter is the attempt by astrophysicists to explain extra-dimensional material that appears to affect gravity in this 3-dimensional universe. We know that there are dimensions that exist outside of the standard length, width and breadth that we measure this plane of existence. The real question is how does something that we can't see or measure directly interact with matter in this universe. Gravity is still the strange force that can't be explained by the GUT.
    • Smokey Bear  •  7 mths ago
      back to the "ether" theory?
    • yarddog  •  Oslo, Norway  •  7 mths ago
      dark matter is absence of matter, or emptiness. matter is moving to that emptiness, seemingly pulled to it, but rather likened to high pressure moving to low pressure.
      hence the universe is accelerating to fill that emptiness. and i mean empty absolutely nothing in these voids. nothing not even light is in these voids like huge empty tendrils of nothing.......yd
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