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Dark matter/Dark Energy
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tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
A NASA scientist says that dark matter could consist of black holes created in the first second after the Big Bang. This because the lumpiness of the X radiation detected by the Chandra telescope corresponds to that of the cosmic infrared background, pointing to a common cause. The argument is discussed on the NASA site and the idea is contained in an article published on May 24 in Astrophysical Journal Letters. Tullio |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
A NASA scientist says that dark matter could consist of black holes created in the first second after the Big Bang. This because the lumpiness of the X radiation detected by the Chandra telescope corresponds to that of the cosmic infrared background, pointing to a common cause. The argument is discussed on the NASA site and the idea is contained in an article published on May 24 in Astrophysical Journal Letters. Interesting. Thanks for posting this tullio. :) |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
They don't know anything. Biggest galactic map will throw light on 'dark energy' An international team of astronomers has created the largest ever three-dimensional map of distant galaxies in a bid to help them understand one of the most mysterious forces in the universe. Scientists including a team led by Dr Florian Beutler at the University of Portsmouth's Institute of Cosmology and Gravitation have spent a decade collecting measurements of 1.2 million galaxies as part of the Sloan Digital Sky Survey III (SDSS-III). http://phys.org/news/2016-07-biggest-galactic-dark-energy.html |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Dark matter still MIA after most exhaustive search yet. :-) Scientists Looking for Invisible Dark Matter Can't Find Any Scientists have come up empty-handed in their latest effort to find elusive dark matter, the plentiful stuff that helps galaxies like ours form. For three years, scientists have been looking for dark matter — which though invisible, makes up more than four-fifths of the universe's matter — nearly a mile underground in a former gold mine in Lead, South Dakota. But on Thursday they announced at a conference in England that they didn't find what they were searching for, despite sensitive equipment that exceeded technological goals in a project that cost $10 million to build. http://abcnews.go.com/Technology/wireStory/scientists-invisible-dark-matter-find-40767195 |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Well, they haven't found God either, so maybe God is dark matter, or dark matter is God. Well, they found the God Damn Particle AKA Higg's Boson after many years. Dark matter particles however... If not found probably the Standard Model will have to go. |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Well, they haven't found God either, so maybe God is dark matter, or dark matter is God. I really don't know if I should put a smiley after that statement, or not.... Sorry about that. Bad habit. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
The Standard Model does not include Dark Matter. Recently there was a suspicion of a 750 GeV particle also not foreseen by the Standard Model, but it seems to have disappeared. Tullio |
Bob DeWoody Send message Joined: 9 May 10 Posts: 3387 Credit: 4,182,900 RAC: 10 |
$10 million to go look down a deep dark hole and look for something that apparently can't be detected or isn't there to start with. And all to make their math look correct. I did that once on a math problem I couldn't solve. I just added an X at the end of my incorrect answer. When asked by my professor what the X stood for I responded that it was the number needed to multiply my answer by to get the correct answer. The professor laughed and then gave me a zero fo that part of the exam. Bob DeWoody My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
In 1936 astronomer Fritz Zwicki, studying the dynamics of spiral galaxies,spoke of "missing mass" needed to maintain them in that shape. Now it is called "dark matter" and nobody knows what it is made of, despite many efforts to detect it, including the AMS-02 magnetic spectrometer on the ISS. Tullio |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
We may all have to rethink my old pal Johnney Guinness' supposition that dark matter does not exist --at least in the way that we think of matter. Fritz Zwicky also put forth (now discredited) the theory of "Tired Light" I wonder if Fritz's results in this instance assumed a non-rotating space--rotating perhaps in an unseen dimension ?? |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
Can dark matter be in surrounding black holes? Black holes pulls in matter. Maybe why it can't be detected. |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
The search of dark matter is for now to find particles that somehow have the same property having a gravity as normal matter does. But many scientist thinks that gravity is an illusion. That gravity is only the curvature in spacetime. Couldn't the curvature in spacetime already been created in the Bing Bang? Like the WMAP showing us that the universe is not homogen? Galaxies forming like they do forming clusters inside the dark matter's "gravitational pull"/"space time curvature". |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
So far as I know. All people educated in the sciences consider gravity to be a warpage of space and the effect of objects moving down to their lowest level of potential energy. Considering it to be a Force governed by two masses and a universal constant also works for many large scale observations and measurements. |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 31002 Credit: 53,134,872 RAC: 32 |
Heck, maybe dark matter is almost naked singularities that are now so small that they only have one quark in them and they can't evaporate all the way. Saying their hole size is now so small that they can't eat a particle because all particles are larger than the hole they must fall into. |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
The July/August issue of CERN Courier is dedicated to neutrino physics. The suggestion By Bruno Pontecorvo that neutrinos can oscillate between three flavors, the electron neutrino, the muon neutrino and the tau neutrino, has been vindicated by the experiments. This implies that neutrinos have a mass, which has not been measured so far. There are so many of them that even a very small mass (about 1 eV) could make a sizable total mass. What if dark matter is made up from neutrinos? They are Weakly Interacting Massive Particles after all. Tullio |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
Though I don't know where I got the number--I had some time back on these forums predicted a neutrino mass 0f 40 Ev |
janneseti Send message Joined: 14 Oct 09 Posts: 14106 Credit: 655,366 RAC: 0 |
Looks like scientists still don't know the mass of neutrinos. The KATRIN experiment will search for a mass between 0.2 eV and 2 eV. Most of the universe´s matter density is in the form of -unknown- dark matter or dark energy. One candidate for dark matter -the only known so far- are massive neutrinos. Even with masses as small as 3 eV/c2 they could make up about 20% of the universe´s mass. http://www.katrin.kit.edu/77.php |
Lynn Send message Joined: 20 Nov 00 Posts: 14162 Credit: 79,603,650 RAC: 123 |
NASA's Fermi Mission Expands its Search for Dark Matter Dark matter, the mysterious substance that constitutes most of the material universe, remains as elusive as ever. Although experiments on the ground and in space have yet to find a trace of dark matter, the results are helping scientists rule out some of the many theoretical possibilities. Three studies published earlier this year, using six or more years of data from NASA's Fermi Gamma-ray Space Telescope, have broadened the mission's dark matter hunt using some novel approaches. http://www.nasa.gov/feature/goddard/2016/nasas-fermi-mission-expands-its-search-for-dark-matter The universe has hidden the dark matter. Or, it never existed. |
William Rothamel Send message Joined: 25 Oct 06 Posts: 3756 Credit: 1,999,735 RAC: 4 |
Perhaps some studies need to be funded to explore the reasons that we state that there is "Dark Matter" at all. There well may be but why do we say so and what are other explanations for what we think that we see. |
bluestar Send message Joined: 5 Sep 12 Posts: 7264 Credit: 2,084,789 RAC: 3 |
Before I finish off. Is this supposed to be about wonders of nature, or rather forces of nature instead? Is it possible to see the face of God, rather than that of the Devil by looking at such a picture? Does it tell anyting about creation in the same way as perhaps a couple of other things could do? When it comes to the subject of the thread, I will look it up and get back at it later on. The link became too long and the picture probably gets too large here. In fact it does not take the picture this time. |
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