Sign in or 
Location: Dark Energy
Discussion: Dark matter, dark energy
Category:
Discussion Forum /
Science and the UB
Share this
workman34 |
61. RE: ScienceDaily (Aug. 20, 2009)
Aug 22 2009, 7:17 PM EDT
The construction of the spectrograph and telescope modifications are estimated to take three years, beginning in 2011, at a cost of $71 million, with operations costing $2.5 million a year for 10 years.Compared to JDEM’s figure of merit, 313, BigBOSS North alone would achieve 240, and North and South together would achieve 338. At three years to build and 10 years to cover the whole sky, assuming five million targets a year, BigBOSS could take longer than JDEM, which might launch in 2016 at the earliest. The cost is less than a sixth JDEM’s, however, and the risk of failure is minimal – BigBOSS uses existing facilities and proven technology. “BOSS will be the first survey to produce a 3-D map of red galaxies and quasars and clouds of hydrogen gas in the universe, and BOSS is the first BAO survey from which it may be possible to measure the expansion history of the universe. BigBOSS’s map will be far bigger and more detailed,” says Schlegel. “But BigBOSS offers more. One of the most interesting questions in cosmology is the relationship between dark energy and the early inflationary epoch of rapid expansion. Something was happening then, and we wonder if it’s repeating in some way. BigBOSS will have the best sensitivity to the inflationary epoch. In some ways this could be the best argument for BigBOSS of them all.” (Continued) Do you find this valuable? |
|
workman34 |
62. RE: ScienceDaily (Aug. 20, 2009)
Aug 22 2009, 7:17 PM EDT
“BigBOSS: The Ground-Based Stage IV Dark Energy Experiment,” by David J. Schlegel, Chris Bebek, Henry Heetderks, Shirley Ho, Michael Lampton, Michael Levi, Nick Mostek, Nikhil Padmanabhan, Saul Perlmutter, Natalie Roe, Michael Sholl, George Smoot, and Martin White of Lawrence Berkeley National Laboratory, and Arjun Dey, Tony Abraham, Buell Jannuzi, Dick Joyce, Ming Liang, Mike Merrill, Knut Olsen, and Samir Salim of the National Optical Astronomy Observatory, is posted as arXiv:0904.0468v3.(End) Do you find this valuable? |
|
workman34 |
63. Prototype Developed To Detect Dark Matter
Sep 27 2009, 4:13 PM EDT
ScienceDaily (Sep. 25, 2009) — A team of researchers from the University of Zaragoza (UNIZAR) and the Institut d'Astrophysique Spatiale (IAS, in France) has developed a "scintillating bolometer" -- a device that the scientists will use in efforts to detect the dark matter of the universe, and which has been tested at the Canfranc Underground Laboratory in Huesca, Spain. "One of the biggest challenges in physics today is to discover the true nature of dark matter, which cannot be directly observed – even though it seems to make up one-quarter of the matter of the Universe. So we have to attempt to detect it using prototypes such as the one we have developed", Eduardo García Abancéns, a researcher from the UNIZAR's Laboratory of Nuclear Physics and Astroparticles, tells SINC.(Continued) Do you find this valuable? |
|
workman34 |
64. RE: Prototype Developed To Detect Dark Matter
Sep 27 2009, 4:14 PM EDT
García Abancéns is one of the scientists working on the ROSEBUD project (an acronym for Rare Objects SEarch with Bolometers UndergrounD), an international collaborative initiative between the Institut d'Astrophysique Spatiale (CNRS-University of Paris-South, in France) and the University of Zaragoza, which is focusing on hunting for dark matter in the Milky Way.The scientists have been working for the past decade on this mission at the Canfranc Underground Laboratory, in Huesca, where they have developed various cryogenic detectors (which operate at temperatures close to absolute zero: −273.15 °C). The latest is a "scintillating bolometer", a 46-gram device that, in this case, contains a crystal "scintillator", made up of bismuth, germinate and oxygen (BGO: Bi4Ge3O12), which acts as a dark matter detector. "This detection technique is based on the simultaneous measurement of the light and heat produced by the interaction between the detector and the hypothetical WIMPs (Weakly Interacting Massive Particles) which, according to various theoretical models, explain the existence of dark matter", explains García Abancéns. (Continued) Do you find this valuable? |
|
workman34 |
65. RE: Prototype Developed To Detect Dark Matter
Sep 27 2009, 4:15 PM EDT
The researcher explains that the difference in the scintillation of the various particles enables this method to differentiate between the signals that the WIMPs would produce and others produced by various elements of background radiation (such as alpha, beta or gamma particles).In order to measure the miniscule amount of heat produced, the detector must be cooled to temperatures close to absolute zero, and a cryogenic facility, reinforced with lead and polyethylene bricks and protected from cosmic radiation as it housed under the Tobazo mountain, has been installed at the Canfranc underground laboratory. "The new scintillating bolometer has performed excellently, proving its viability as a detector in experiments to look for dark matter, and also as a gamma spectrometer (a device that measures this type of radiation) to monitor background radiation in these experiments", says García Abancéns. The scintillating bolometer is currently at the Orsay University Centre in France, where the team is working to optimise the device's light gathering, and carrying out trials with other BGO crystals. This study, published recently in the journal Optical Materials, is part of the European EURECA project (European Underground Rare Event Calorimeter Array). This initiative, in which 16 European institutions are taking part (including the University of Zaragoza and the IAS), aims to construct a one-tonne cryogenic detector and use it over the next decade to hunt for the dark matter of the Universe. (Continued) Do you find this valuable? |
|
workman34 |
66. RE: Prototype Developed To Detect Dark Matter
Sep 27 2009, 4:16 PM EDT
Methods of detecting dark matterDirect and indirect detection methods are used to detect dark matter, which cannot be directly observed since it does not emit radiation. The former include simultaneous light and heat detection (such as the technique used by the scintillating bolometers), simultaneous heat and ionisation detection, and simultaneous light and ionisation detection, such as research into distinctive signals (the most famous being the search for an annual modulation in the dark matter signal caused by the orbiting of the Earth). There are also indirect detection methods, where, instead of directly seeking the dark matter particles, researchers try to identify other particles, (neutrinos, photons, etc.), produced when the Universe's dark matter particles are destroyed. (END) Do you find this valuable? |
Amadon |
67. RE: Prototype Developed To Detect Dark Matter
Oct 1 2009, 7:49 AM EDT
Thanks for all the science info, Workman. Seems to me sometimes that the scientists are like the blind men and the elephant in a way. They are feeling the various parts of the universe and saying the elephant must be like a piece of rope or the trunk of a tree. They don't recognize a unifying purpose in the universe. But that's the way scientists have to operate; they can't assign God as the direct cause of everything we don't understand. On the other hand, it's a shame when people like Dawkins blame religion for all the ills of the world.
Do you find this valuable?
|
|
Amadon |
68. RE: Prototype Developed To Detect Dark Matter
Oct 1 2009, 9:24 PM EDT
Here's some more info on BOSS:http://www.spacedaily.com/reports/First_Light_For_BOSS_A_New_Kind_Of_Search_For_Dark_Energy_999.html It's a really impressive undertaking. I wonder how long it takes them to plug in those thousand fiber optic cables ever morning? Sounds like grunt work : )
Do you find this valuable?
|
|
workman34 |
69. RE: Prototype Developed To Detect Dark Matter
Oct 2 2009, 12:27 AM EDT
" They don't recognize a unifying purpose in the universe. But that's the way scientists have to operate; they can't assign God as the direct cause of everything we don't understand. "Great analogy Amadon, I always hope that some day they will make the "Spiritual Connection" about things they can't explain. Do you find this valuable? |
haworth606 |
70. RE: Dark matter, dark energy
Oct 3 2009, 11:31 PM EDT
This is a concept that has recently intrigued me. I thought, perhaps, the dark energy/matter, had more to do with Power Centers and Force Organizer's "grasp" upon the local, central and superuniverse.Another point upon astronomy and the UB is cosmology. I believe that the constellation Cygnus, specifically Cygnus X-1, could be Satania's center i.e...Jerusem and that the Sagittarius system is the headquarters of Nebadon. And of course, that the center of the milky way is Orvonton. Interestingly, I read that the gravitational center of the Milky Way, Orvonton, is between us and the Andromeda Galaxy, superuniverse # 6?. Also, that the pleiades cluster is known in the UB as Avalon, Ursa Major, the big dipper is Wolvering, and that the Southern Cross is Fanoving. Interested in hearing responses to this, Jeff www.reality-ize.com Do you find this valuable? |
|
Amadon |
71. RE: Dark matter, dark energy
Oct 4 2009, 10:33 PM EDT
Hi Jeff, You might find my article about the cosmology of the Urantia Book of interest: http://www.squarecircles.com/articles/bain/twoorvontons.htm Dick
Do you find this valuable?
|
|
haworth606 |
72. RE: Dark matter, dark energy
Oct 5 2009, 11:33 AM EDT
"Hi Jeff, You might find my article about the cosmology of the Urantia Book of interest: http://www.squarecircles.com/articles/bain/twoorvontons.htm Dick"Thanks Dick for the article. I am more confused than ever! lol I heard on the tv show, "The Universe" that the Andromeda galaxy will collide with the milky way in a million years. So the thought that the milky way is a minor sector is plausible. Wouldn't it be nice to receive further clarification from the beings. I wonder how much info was, "lost in translation." The authors clearly point out our paucity of language/words. Nebula is obviously one used for multiple contexts and meanings. Personally, I try not to read the book verbatim, rather the spirit of the info and the general ideas or concepts. Thanks again for the article, Jeff Do you find this valuable? |
|
Amadon |
73. RE: Dark matter, dark energy
Oct 6 2009, 4:42 PM EDT
The science and astronomy in the UBk is a really mixed bag. On the one hand, the authors tell us that we will find errors in the science as we progress (like the distance to the Andromeda galaxy) but on the other hand, there are concepts in there that were not known in the 30's, like the idea of a supernova collapse being caused by an out-flux of neutrinos. I have my own suspicions about why they did it this way, but many people don't like the idea that the authors did it to keep us from making a fetish of the UBk. They think that's too sneaky.If the Andromeda galaxy is in the first outer space level, then it's moving past us; if not, the astronomers might be right. In any case, there is so much room between stars that the 'collision ' will not result in many star collisions. However, the clouds of gas and dust in the two will collide and trigger off the formation of a lot of stars. Ought to be exciting! I've given up trying to use the science of the book as a selling point when introducing it; I think it's great strength is its spiritual message. Do you find this valuable? |
|
workman34 |
74. Is Unknown Force In Universe Acting On Dark Matter?
Oct 23 2009, 11:18 PM EDT
ScienceDaily (Oct. 23, 2009) — An international team of astronomers have found an unexpected link between mysterious 'dark matter' and the visible stars and gas in galaxies that could revolutionize our current understanding of gravity.One of the astronomers, Dr Hongsheng Zhao of the SUPA Centre of Gravity, University of St. Andrews, suggests that an unknown force is acting on dark matter. The findings are published this week in the scientific journal Nature. Only 4% of the universe is made of known material. Stars and gas in galaxies move so fast that astronomers have speculated that the gravity from a hypothetical invisible halo of dark matter is needed to keep galaxies together. However, a solid understanding of dark matter as well as direct evidence of its existence has remained elusive...........Continued Do you find this valuable? |
|
workman34 |
75. RE: Is Unknown Force In Universe Acting On Dark Matter?
Oct 23 2009, 11:19 PM EDT
Now the team believes that the interactions between dark and ordinary matter could be more important and more complex than previously thought, and even speculate that dark matter might not exist and that the anomalous motions of stars in galaxies are due to a modification of gravity on extragalactic scales.Dr. Benoit Famaey (Universities of Bonn and Strasbourg) explains: "The dark matter seems to 'know' how the visible matter is distributed. They seem to conspire with each other such that the gravity of the visible matter at the characteristic radius of the dark halo is always the same. This is extremely surprising since one would rather expect the balance between visible and dark matter to strongly depend on the individual history of each galaxy." Dr. Zhao at the SUPA Centre of Gravity notes, "The pattern that the data reveal is extremely odd. It's like finding a zoo of animals of all ages and sizes miraculously having identical, say, weight in their backbones or something. It is possible that a non-gravitational fifth force is ruling the dark matter with an invisible hand, leaving the same fingerprints on all galaxies, irrespective of their ages, shapes and sizes.".........Continued Do you find this valuable? |
|
workman34 |
76. RE: Is Unknown Force In Universe Acting On Dark Matter?
Oct 23 2009, 11:21 PM EDT
Such a force might solve an even bigger mystery, known as 'dark energy', which is ruling the accelerated expansion of the Universe. A more radical solution is a revision of the laws of gravity first developed by Isaac Newton in 1687 and refined by Albert Einstein's theory of General Relativity in 1916. Einstein never fully decided whether his equation should add an omnipresent constant source, now called dark energy.Dr Famaey added, "If we account for our observations with a modified law of gravity, it makes perfect sense to replace the effective action of hypothetical dark matter with a force closely related to the distribution of visible matter.".......Continued Do you find this valuable? |
|
workman34 |
77. RE: Is Unknown Force In Universe Acting On Dark Matter?
Oct 23 2009, 11:21 PM EDT
The implications of the new research could change some of the most widely held scientific theories about the history and expansion of the universe.Lead researcher Dr. Gianfranco Gentile at the University of Ghent concludes, "Understanding this puzzling conspiracy is probably the key to unlock the formation of galaxies and their structures." Do you find this valuable? |
|
Amadon |
78. RE: Is Unknown Force In Universe Acting On Dark Matter?
Oct 24 2009, 9:44 PM EDT
Good stuff, Workman. The authors of the UBk do say that gravity does not exactly follow the inverse square law rule. It would be really gratifying to see science confirm that. The Pioneer spacecraft anomaly seems to point to a deviation from the square law rule as well. But you can be sure that the proponents of dark matter and dark energy will be calling this a load of equine fertilizer : )
Do you find this valuable?
|
|
workman34 |
79. RE: Is Unknown Force In Universe Acting On Dark Matter?
Oct 24 2009, 9:58 PM EDT
"But you can be sure that the proponents of dark matter and dark energy will be calling this a load of equine fertilizer : )" I'm afraid I have to agree with you on that Bro. Do you find this valuable? |
