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Keyword: stringtheory

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  • LHC Particle Soup Is the Hottest Thing Mankind Ever Made (CERN Scientists at work)

    08/15/2012 7:00:33 PM PDT · by Ernest_at_the_Beach · 14 replies
    Gizmodo ^ | Aug 14, 2012 2:20 PM | Mario Aguilar
    Scientists at CERN's Large Hadron Collider say they just temporarily created the hottest man-made temperature by colliding two lead ions. According to a source working on the project, the collision sprung loose a plasma "soup" of sub-atomic gluons and quarks at an estimated temperature of 5.5-trillion-degrees Celsius. We won't know just how hot the plasma was for at least a few weeks because the measurements are very delicate and have to be converted to degrees. The consensus seems to be that it will shatter the previous record, which was about 4 trillion degrees.The craziest thing is that this might not...
  • Glaswegian scientists snap entangled particles --- Next: the Schrödinger's LOL-cat blog?

    08/10/2012 10:09:26 AM PDT · by Ernest_at_the_Beach · 23 replies
    The Register ^ | 10th August 2012 00:15 GMT | Richard Chirgwin
    A group of physicists at the University of Glasgow is claiming a first: taking photos of entangled photons. In this paper in Nature (hooray for free access!), they explain that their 201 x 201 pixel images captured around 2,500 different entangled quantum states. The entangled photons were imaged using different lens configurations to capture correlations of position and momentum – the characteristics (to shorthand Heisenberg’s uncertainty principle) that mutually preclude excessive knowledge about a given quantum system. From the 100,000 images taken by their setup (pictured*), the scientists say they were able to observe 2,500 states which they described as...
  • UM Scientists Hear ‘Scream’ As Star Is Devoured By Black Hole

    08/07/2012 3:26:22 PM PDT · by null and void · 40 replies
    CBS Detroit ^ | August 6, 2012 6:16 PM | Matt Roush
    ANN ARBOR — Astrophysicists have detected, for the first time, the oscillating signal that heralds the last gasps of a star falling victim to a previously dormant supermassive black hole. Led by researchers at the University of Michigan, the team documented the event with the Suzaku and XMM-Newton orbiting X-ray telescopes. These instruments picked up semi-regular blips in the light from a numerically-named galaxy 3.9 billion light years away in the northern constellation Draco the dragon. The blips, scientifically known as “quasiperiodic oscillations,” occurred steadily every 200 seconds, but occasionally disappeared. Such signals have often been detected at smaller black...
  • How Black Holes Shape the Galaxies, Stars and Planets around Them

    07/26/2012 7:17:56 PM PDT · by LibWhacker · 13 replies
    Scientific American ^ | 7/17/12 | Caleb Scharf
    The matter-eating beast at the center of the Milky Way may actually account for Earth's existence and habitabilityAdapted from Gravity’s Engines: How Bubble-Blowing Black Holes Rule Galaxies, Stars, and Life in the Cosmos, by Caleb ScharfOur existence in this place, this microscopic corner of the cosmos, is fleeting. with utter disregard for our wants and needs, nature plays out its grand acts on scales of space and time that are truly hard to grasp. Perhaps all that we can look to for real solace is our endless capacity to ask questions and seek answers about the place we find ourselves...
  • Behind the Higgs: A primer on a long-sought boson

    07/25/2012 4:14:10 PM PDT · by SunkenCiv · 9 replies
    Science News ^ | July 28th, 2012 | Tom Siegfried
    In 1964, physicist Peter Higgs of the University of Edinburgh proposed that the infant universe (as in, perhaps a trillionth of a second old) experienced... a phase transition. In much the way an iron bar can suddenly become a magnet when cooled below a certain temperature, space itself acquired a new feature. Instead of a magnetic field, space was filled with a new forcelike field -- since named for Higgs. Other physicists worked out similar scenarios at about the same time, and later work showed how the Higgs phase transition could explain the distinct identities of two of nature's basic...
  • Notes from a parallel universe

    04/29/2002 6:51:57 PM PDT · by lds23 · 84 replies · 730+ views
    Discover ^ | April 2002 | Jennifer Kahn
    Notes from a parallel universe Inside the X-files at the University of California at Berkeley, the line between theory and fantasy, science and supposition, starts to dissolve. The authors of these dissertations are obsessed—and scientists are nearly as obsessed with them Eleven years ago Eugene Sittampalam was sitting in a hotel room on the Libyan coast when he stumbled, as if by fate, on the unified field theory of physics. "I was on an engineering project at the time, with hardly any social life," he says. "I would retire to my room after dinner. I would switch on the radio,...
  • Russian maths genius may turn down $1m prize [solved the Poincaré conjecture]

    03/28/2010 1:40:12 AM PDT · by bruinbirdman · 68 replies · 2,302+ views
    The Telegraph ^ | 3/27/2010 | Andrew Osborn in Moscow and Olga Krepysheva in St. Petersburg
    Inside the world of Grigory Perelman: the man who solved the world's toughest maths problem proves to be a puzzle himself. He has been called "the cleverest man in the world" and shook academia to its foundations when he announced he had solved a fiendish mathematical problem that had baffled the planet's best brains for a century. Yet Grigory Perelman, a 43-year-old Russian mathematician, has consciously spurned plaudits and wealth to subsist like a hermit. He lives in a 2-bedroom flat with his elderly mother in a dilapidated Soviet-era tower block in St. Petersburg, while neighbours complain that his own...
  • The Big Bang Never Happened

    03/07/2011 1:44:47 PM PST · by wendy1946 · 133 replies
    YouTube ^ | 6/9/09 | Randall Meyers
    In nine parts on YouTubePart 1Part 2Part 3Part 4Part 5Part 6Part 7Part 8Part 9 A spectacular exposition featuring heavyweights in astronomy, mathematics, plasma physics, cosmology etc. including Halton Arp, Tony Peratt, Eric Lerner, Fred Hoyle and a number of others, and yet comprehensible to the educated layman. The "big bang" which we've heard about all our lives turns out to be junk physics.
  • Misconceptions about the Big Bang

    02/24/2005 3:54:37 AM PST · by PatrickHenry · 222 replies · 4,346+ views
    Scientific American ^ | March 2005 | Charles H. Lineweaver and Tamara M. Davis
    Baffled by the expansion of the universe? You're not alone. Even astronomers frequently get it wrong. The expansion of the universe may be the most important fact we have ever discovered about our origins. You would not be reading this article if the universe had not expanded. Human beings would not exist. Cold molecular things such as life-forms and terrestrial planets could not have come into existence unless the universe, starting from a hot big bang, had expanded and cooled. The formation of all the structures in the universe, from galaxies and stars to planets and Scientific American articles, has...
  • Fear of black hole machine triggers threats to researchers

    09/06/2008 1:07:57 PM PDT · by mainestategop · 81 replies · 313+ views
    worldnetdaily ^ | 9/6/08 | Drew Zahn
    Scientists preparing to fire up the world's largest atom smasher are being flooded with phone calls and emails – even death threats – from people worried that the Large Hadron Collider, when activated, will obliterate planet Earth.
  • String theorists squeeze nine dimensions into three

    07/25/2012 3:36:54 PM PDT · by SunkenCiv · 22 replies
    Science News ^ | Friday, January 13th, 2012 | Devin Powell
    A simulation of the early universe using string theory may explain why space has three observable spatial dimensions instead of nine. The leading mathematical explanation of physics goes beyond modern particle theory by positing tiny bits of vibrating string as the fundamental basis of matter and forces. String theory also requires that the universe have six or more spatial dimensions in addition to the ones observed in everyday life. Explaining how those extra dimensions are hidden is a central challenge for string theorists... In the simulation, the universe starts off as a tiny blob of strings that is symmetric in...
  • How Big is the Entire Universe?

    07/21/2012 12:57:15 AM PDT · by LibWhacker · 61 replies
    Starts with a Bang ^ | 7/18/12 | Ethan Siegel
    (25) Millenium simulation from Volker Springel et al., from the Max Planck Institute for Astrophysics. “The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.” -Stephen Hawking The Universe is a vast, seemingly unending marvel of existence. Over the past century, we’ve learned that the Universe stretches out beyond the billions of stars in our Milky Way, out across billions of light years, containing close to a trillion galaxies all told.Image credit: NASA, ESA, S. Beckwith (STScI) and the HUDF Team. And yet, that’s just the observable Universe! There are good reasons to believe that the...
  • Hubble spots spiral galaxy that shouldn't exist

    07/18/2012 5:08:07 PM PDT · by Olog-hai · 59 replies
    Los Angeles Times ^ | July 18, 2012, 1:05 p.m. | Thomas H. Maugh II
    Astronomers using the Hubble Space Telescope have discovered the oldest known spiral galaxy, a 10.7-billion-year-old anomaly that by all rights shouldn't exist. The galaxy was present in the early universe, about 3 billion years after the Big Bang, at a time when galaxies were still forming and normally looked clumpy and irregular. … In fact, it is a so-called grand design spiral galaxy, which has prominent, well-formed spiral arms. "The fact that this galaxy exists is astounding," Law said. "Current wisdom holds that such grand design spiral galaxies didn't exist at such an early time in the history of the...
  • A Stroll Through the Lyman-Alpha Forest!

    02/19/2004 1:54:19 PM PST · by vannrox · 19 replies · 5,272+ views
    Alternate View Column AV-116 ^ | 08/06/2002 | by John G. Cramer
     As the author of these columns describing cutting edge physics and astronomy, I get quite a few letters and E-mail from readers who are more interested in ?over-the-edge physics and astronomy?.  One recurring theme is various alternatives to the standard model of Big Bang cosmology.  Perhaps the universe is not expanding; it?s just that light ?gets tired? on its path from far away and loses some of its energy.  Perhaps quasars are closer than we think, particularly since some of them appear to be linked to closer galaxies.  Perhaps relativity is wrong, and it?s the speed of light that is...
  • Chandra Discovers "Rivers Of Gravity" That Define Cosmic Landscape

    08/02/2002 4:41:48 PM PDT · by vannrox · 60 replies · 970+ views
    ScienceDaily Magazine ^ | Thursday, August 01, 2002 | Editorial Staff
    Reprinted from ScienceDaily Magazine ...Source:             NASA/Marshall Space Flight Center Date Posted:    Thursday, August 01, 2002Web Address:   http://www.sciencedaily.com/releases/2002/08/020801080835.htm Chandra Discovers "Rivers Of Gravity" That Define Cosmic Landscape NASA's Chandra X-ray Observatory has discovered part of an intergalactic web of hot gas and dark matter that contains most of the material in the universe. The hot gas, which appears to lie like a fog in channels carved by rivers of gravity, has been hidden from view since the time galaxies formed. "The Chandra observations, together with ultraviolet observations, are a major advance in our understanding of how the universe evolved over the last 10 billion...
  • Evidence found for existence of intermediate size black hole

    07/08/2012 10:58:16 AM PDT · by Ernest_at_the_Beach · 15 replies
    phys.org ^ | July 6, 2012 | Bob Yirka report
    EnlargeGalaxy ESO 243-49, about 300 million light-years away, is home to the newly found black hole. Credit: NASA, ESA and S. Farrell (U. Sydney) (Phys.org) -- Over the years, cosmologists have found ample evidence of just two kinds of black holes: stellar mass black holes and supermassive black holes. The former are considered small by most standards, just several times the weight of our sun; the latter, as their name implies, huge and as heavy as millions of our sun combined. Not so easy to find have been those that lie somewhere in-between, and because of that, their existence...
  • Revealed at last: Universe's intergalactic dark matter skeleton

    07/07/2012 2:37:39 PM PDT · by Ernest_at_the_Beach · 16 replies
    The Register ^ | 6th July 2012 22:55 GMT | Rik Myslewski in San Francisco
    Boffins' first glimpse of the structural framework of our universe Higgs, Schmiggs... When that infinitesimal speck was sucking up all the journalistic oxygen on Independence Day, another momentous scientific discovery was also being announced: the first observation of filaments of dark matter, the stuff that forms the "skeleton" of our universe. Invisible, inexplicable dark matter makes up the vast majority of the mass of our universe. All the matter that we can see – stars, galaxies, planets, haggis, Michele Bachman – total only between 4 and 5 per cent of our universe's mass. The rest? There's dark matter and dark...
  • Serious blow to dark matter theories? New study finds mysterious lack of dark matter...

    04/18/2012 12:11:06 PM PDT · by Red Badger · 58 replies
    http://phys.org ^ | 04-18-2012 | Provided by ESO
    Full title: Serious blow to dark matter theories? New study finds mysterious lack of dark matter in Sun's neighborhood The most accurate study so far of the motions of stars in the Milky Way has found no evidence for dark matter in a large volume around the Sun. According to widely accepted theories, the solar neighbourhood was expected to be filled with dark matter, a mysterious invisible substance that can only be detected indirectly by the gravitational force it exerts. But a new study by a team of astronomers in Chile has found that these theories just do not fit...
  • American Accelerator's Last Hurrah: 99.8% Certainty God Particle is Found

    07/05/2012 8:30:21 AM PDT · by Ernest_at_the_Beach · 42 replies
    Daily Tech ^ | July 3, 2012 7:58 PM | Jason Mick (Blog)
    Tevatron presents strong evidence Higgs boson was observed, but LHC needed to provide final verificationTomorrow, while America celebrates July 4, mankind worldwide may celebrate a separate momentous event -- the discovery of the legendary Higgs boson. I. Riding Into the Sunset -- Tevatron Goes Out With a Bang The European Organization for Nuclear Research (CERN) will tomorrow hold a special press conference at 9 a.m.  The event will provide an update to the world on the progress in the search for the critical particle using the Large Hadron Collider, the largest and most expensive laboratory apparatus in history.  Many physicists...
  • "It's a boson:" Higgs quest bears new particle

    07/04/2012 7:20:50 AM PDT · by James C. Bennett · 46 replies
    Reuters ^ | July 4, 2012 | Reuters
    GENEVA: Scientists at Europe's CERN research center have found a new subatomic particle, a basic building block of the universe, which appears to be the boson imagined and named half a century ago by theoretical physicist Peter Higgs. "We have reached a milestone in our understanding of nature," CERN director general Rolf Heuer told a gathering of scientists and the world's media near Geneva on Wednesday. "The discovery of a particle consistent with the Higgs boson opens the way to more detailed studies, requiring larger statistics, which will pin down the new particle's properties, and is likely to shed light...