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Keyword: blackholes

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  • Mysterious quasar casts doubt on black holes

    07/28/2006 5:45:35 PM PDT · by annie laurie · 10 replies · 312+ views
    NewScientistSpace ^ | 27 July 2006 | David Shiga
    A controversial alternative to black hole theory has been bolstered by observations of an object in the distant universe, researchers say. If their interpretation is correct, it might mean black holes do not exist and are in fact bizarre and compact balls of plasma called MECOs. Rudolph Schild of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, US, led a team that observed a quasar situated 9 billion light years from Earth. A quasar is a very bright, compact object, whose radiation is usually thought to be generated by a giant black hole devouring its surrounding matter. A rare cosmological...
  • Mini Black Holes Might Reveal 5th Dimension

    06/26/2006 8:22:41 PM PDT · by NormsRevenge · 26 replies · 962+ views
    Space.com ^ | 6/25/06 | Ker Than
    A space telescope scheduled for launch in 2007 will be sensitive enough to detect theoretical miniature black holes lurking within our solar system, scientists say. By doing so, it could test an exotic five-dimensional theory of gravity that competes with Albert Einstein's General Theory of Relativity. That is, of course, if the tiny black holes actually exist. The idea, recently detailed online in the journal Physical Review D, is being proposed by Charles Keeton, a physicist at Rutgers University in New Jersey, and Arlie Petters of Duke University in North Carolina. Branes The Randall-Sundrum braneworld model, named after the scientists...
  • Scientists: Black Holes Energy-Efficient

    04/24/2006 4:40:32 PM PDT · by NormsRevenge · 16 replies · 464+ views
    AP on Yahoo ^ | 4/24/06 | Seth Borenstein - ap
    WASHINGTON - With gasoline hitting $3 per gallon, scientists have just found the most energy-efficient engines in the universe black holes, those whirling super-dense centers of galaxies that suck in nearly everything. The jets of energy spurting out of older ultra-efficient black holes also seem to be playing a crucial role as zoning cops in large galaxies, preventing too many stars from sprouting. That explains why there aren't as many burgeoning galaxies chock full of stars as previously expected, said scientists citing results from NASA's Chandra X-ray Observatory that were released Monday. For the first time, scientists measured both...
  • Three cosmic enigmas, one audacious answer [bye-bye to black holes?]

    03/09/2006 8:34:42 PM PST · by snarks_when_bored · 103 replies · 2,349+ views
    New Scientist ^ | March 9, 2006 | Zeeya Merali
    Three cosmic enigmas, one audacious answer 09 March 2006 Exclusive from New Scientist Print Edition Zeeya Merali DARK energy and dark matter, two of the greatest mysteries confronting physicists, may be two sides of the same coin. A new and as yet undiscovered kind of star could explain both phenomena and, in turn, remove black holes from the lexicon of cosmology. The audacious idea comes from George Chapline, a physicist at Lawrence Livermore National Laboratory in California, and Nobel laureate Robert Laughlin of Stanford University and their colleagues. Last week at the 22nd Pacific Coast Gravity Meeting in Santa Barbara,...
  • Vanishing Gas Confirms Black Hole Event Horizons

    01/09/2006 5:04:11 PM PST · by KevinDavis · 9 replies · 454+ views
    space.com ^ | 01/09/06 | Ker Than
    Washington, DCA type of X-ray explosion found on neutron stars does not occur near black holes, scientists announced here today. The lack of explosions is strong evidence for the existence of a black hole event horizon, a theoretical boundary into which matter vanishes and cannot escape. The explosions are brief thermonuclear eruptions called type I X-ray bursts and last about one minute. The bursts occur every several hours on the surface of very small, dense stars called neutron stars. They are fueled by gas that a neutron star siphons off a companion star. The gas accumulates on the neutron star's...
  • Swirl Theory - For the "Told You So" archives.

    10/01/2005 12:30:30 AM PDT · by md2576 · 34 replies · 1,548+ views
    My "Swirl Theory"We hear of string theory, the Big Bang and many other ideas.I have come up with this idea over the past several days. Katrina and Rita has turned my attention towards this as I have discovered a new theory as of late that black holes may be present at the center of each galaxy.Using the theory that a black hole could have possibly been created in space by gases which collapsed into itself churning and sucking gasses and space debris around it into a swirling vortex. This swirling vortex of gas eventually condensed into planets and solar systems.Here...
  • Semi-News: Star Collapses, Bush Blamed

    09/19/2005 11:33:01 AM PDT · by John Semmens · 29 replies · 1,203+ views
    AZCONSERVATIVE ^ | Sep 17, 2005 | John Semmens
    Astronomers have detected the most distant explosion yet. A massive star collapsed into a black hole some 12.6 billion light years from Earth. The event occurred an estimated 1.1 billion years after the "Big Bang" that created the universe. Howard Dean, chairman of the Democratic National Committee, was quick to affix blame on President Bush. "The Big Bang should've been ample warning that cataclysms of this magnitude were possible," said Dean. "Yet, we find that the Bush Administration was caught totally unprepared for this latest explosion. The fact that this explosion occurred in a black hole further emphasizes the racial...
  • Regarding the Origin of the Universe - (excellent; reasoned; balanced; thoughtful; humbling)

    05/31/2005 11:07:29 PM PDT · by CHARLITE · 51 replies · 1,355+ views
    THE RANT.US ^ | MAY 22, 2005 | ALAN BURKHART
    Am I the only one who marvels at the futility of Man as he tries to explain the origin of the universe? The time and effort expended upon this pursuit could be far better spent upon issues that actually lack an answer. Trying to find a new explanation for the cosmos via science is like trying to reinvent the wheel. For the sake of argument lets assume that the universe happened by accident just as many so-called scientists claim. With this as a starting point we can make the assumption that there was a source of crude matter from which...
  • Early Universe was packed with mini black holes ~~

    05/13/2005 12:09:46 PM PDT · by Ernest_at_the_Beach · 15 replies · 359+ views
    PhysOrg.com ^ | April 13, 2005 | Dr Martin Haehnelt
    Early Universe was packed with mini black holes A research group at Cambridge think that the universe might once have been packed full of tiny black holes. Dr Martin Haehnelt, a researcher in the group led by Astronomer Royal Martin Rees, will present new evidence to support this controversial idea at the Institute of Physics conference Physics 2005 in Warwick. Most cosmologists believe that supermassive black holes grew up in big galaxies, accumulating mass as time went on. But Haehnelt says there is increasing evidence for a different view that small black holes grew independently and merged to...
  • Black holes 'do not exist'

    04/05/2005 10:43:19 AM PDT · by ShadowAce · 28 replies · 1,199+ views
    Nature.com ^ | 31 March 2005 | Philip Ball
    Black holes are staples of science fiction and many think astronomers have observed them indirectly. But according to a physicist at the Lawrence Livermore National Laboratory in California, these awesome breaches in space-time do not and indeed cannot exist. Over the past few years, observations of the motions of galaxies have shown that some 70% the Universe seems to be composed of a strange 'dark energy' that is driving the Universe's accelerating expansion. George Chapline thinks that the collapse of the massive stars, which was long believed to generate black holes, actually leads to the formation of stars that contain...
  • Exotic black holes spawn new universal law

    03/23/2005 4:43:32 PM PST · by LibWhacker · 36 replies · 1,115+ views
    New Scientist ^ | 3/23/05 | Jenny Hogan
    Black holes may define the perfect fluid, suggests a study of black holes that only exist in a theoretical 10-dimensional space. The finding may have spawned a new universal law in physics, which puts constraints on the way fluids behave in the real world. Dam Thanh Son from the University of Washington, US, and his colleagues used string theory to model a 10-dimensional black hole as a liquid. String theory tries to explain fundamental properties of the universe by predicting that seven more spatial dimensions exist on top of the known three. While the concept is currently unproven as a...
  • Going Beyond Einstein: Spacetime Wave Orbits Black Hole

    01/14/2005 6:18:08 PM PST · by snarks_when_bored · 36 replies · 36,243+ views
    Going Beyond Einstein: Spacetime Wave Orbits Black Hole San Diego, CA--Astronomers Jon Miller (Harvard-Smithsonian Center for Astrophysics) and Jeroen Homan (MIT) have seen evidence of hot iron gas riding a ripple in spacetime around a black hole. This spacetime wave, if confirmed, would represent a new phenomenon that goes beyond Einstein's general relativity. These observations confirm one important theory about how a black hole's extreme gravity can stretch light. The data also paint an intriguing image of how a spinning black hole can drag the very fabric of space around with it, creating a choppy spacetime sea that distorts everything...
  • Milky Way's Center Packed with Black Holes

    01/12/2005 9:07:35 PM PST · by NormsRevenge · 24 replies · 951+ views
    Space.com ^ | 1/12/05 | Robert Ray Britt
    SAN DIEGO -- A new study reveals that the center of our Milky Way Galaxy is loaded with black holes, as astronomers have expected in recent years. The galactic center is dominated by one supermassive black hole. It packs a mass equal to about 3 million Suns. Around it, scientists have expected to find a high concentration of stellar black holes, the sort that result from the collapse of massive stars. Each can be a few to many times the mass of the Sun. Observations have hinted at the existence of many stellar black holes near the galactic center. But...
  • Songs of the Galaxies, and What They Mean

    08/03/2004 6:41:24 PM PDT · by neverdem · 33 replies · 939+ views
    NY Times ^ | August 3, 2004 | DENNIS OVERBYE
    Another black hole is singing, although it seems a little tone-deaf. Last year, astronomers discovered that outbursts from a giant black hole were spreading pressure waves through the thin hot gas of the distant Perseus cluster of galaxies. The frequency of these waves was equivalent to a B flat, 57 octaves below middle C, the astronomers calculated. Now another group of astronomers has discovered waves from another massive black hole spreading outward from the center of a galaxy known as M87 at the heart of the Virgo cluster, about 50 million light-years from Earth. They appear as rings and arcs...
  • Questions That Plague Physics: A Conversation with Lawrence M. Krauss [Cosmology & Creationism]

    07/26/2004 8:53:54 AM PDT · by PatrickHenry · 85 replies · 1,843+ views
    Scientific American ^ | August 2004 issue | Staff
    SCIENTIFIC AMERICAN: What are the top questions bedeviling physicists today? LAWRENCE KRAUSS: Three that I find fascinating are: What is the nature of dark energy? How can we reconcile black hole evaporation with quantum mechanics? And, finally, do extra dimensions exist? They are all connected. And they are all going to require some new insights into quantum gravity. But someone is going to have to come up with a totally new and remarkable idea. And it's hard to predict when that is going to happen. In 1904 you couldn't have predicted that Albert Einstein would come up with a remarkable...
  • About Those Fearsome Black Holes? Never Mind

    07/22/2004 9:17:06 PM PDT · by neverdem · 30 replies · 854+ views
    NY Times ^ | July 22, 2004 | DENNIS OVERBYE
    Dr. Stephen W. Hawking threw in the towel yesterday, or at least an encyclopedia. Dr. Hawking, the celebrated Cambridge University cosmologist and best-selling author, declared at a scientific conference in Dublin that he had been wrong in a controversial assertion he made 30 years ago about black holes, the fearsome gravitational abysses that can swallow matter and energy, even light. As atonement he presented Dr. John Preskill, a physicist from the California Institute of Technology, with a baseball encyclopedia. The encyclopedia was the stake in a famous bet Dr. Hawking and another Caltech physicist, Dr. Kip Thorne, made with Dr....
  • Hawking cracks black hole paradox

    07/14/2004 12:22:21 PM PDT · by PatrickHenry · 138 replies · 5,249+ views
    NewScientist ^ | 14 July 2004 | Jenny Hogan
    After nearly 30 years of arguing that a black hole destroys everything that falls into it, Stephen Hawking is saying he was wrong. It seems that black holes may after all allow information within them to escape. Hawking will present his latest finding at a conference in Ireland next week. The about-turn might cost Hawking, a physicist at the University of Cambridge, an encyclopaedia because of a bet he made in 1997. More importantly, it might solve one of the long-standing puzzles in modern physics, known as the black hole information paradox. It was Hawking's own work that created the...
  • Threat Matrix: Daily Terror Threat - Thread Eleven

    06/24/2004 12:40:07 AM PDT · by JustPiper · 4,145 replies · 9,333+ views
    WND ^ | 6/24/04 | N/A
    Picture credit: TheCabal"I will never cower before any master nor bend to any threat"LINK TO THREAD TEN Iran seeks swap of Brits for suicide attackers Report says 40 Revolutionary Guard 'volunteers' held by UK Iran apprehended British military personnel and Navy vessels earlier this week in order to secure release of 40 "suicide operations volunteers" held by the UK, according to an Iranian Revolutionary Guard source. The source told the London Arabic-language daily Al-Sharq Al-Awsat that the British Army command in Iraq received the demand from the Revolutionary Guard, reported the Middle East Media Research Institute. According to the source,...
  • Missing Black Holes Found

    05/29/2004 3:38:48 PM PDT · by NormsRevenge · 41 replies · 278+ views
    Yahoo! News ^ | 5/29/04 | Robert Roy Britt - Space.com
    European researchers have found 30 previously hidden supermassive black holes anchoring faraway galaxies, which suggests there at least twice as many of the colossal gravity wells as thought. Supermassive black holes hold as much matter as millions or billions of suns. The newfound black holes were long sought but went unnoticed because they lurk behind veils of dust and are so faraway that even the galaxies they anchor are difficult to examine in any detail. "This discovery means that surveys of powerful supermassive black holes have so far underestimated their numbers by at least a factor of two, and possibly...
  • Black Holes' Vast Power Is Documented

    02/18/2004 11:53:51 PM PST · by neverdem · 28 replies · 234+ views
    NY TIMES ^ | February 19, 2004 | JOHN NOBLE WILFORD
    New X-ray observations by orbiting satellites have given astronomers their first telling evidence that appears to confirm what had been only theory: that a star is doomed if it ventures too close to a supermassive black hole. The National Aeronautics and Space Administration and the European Space Agency announced yesterday the detection of a brilliant flare of X-rays from the heart of a distant galaxy, followed by a fading afterglow. After analysis, an international team of scientists concluded that the telescopes had witnessed the overpowering gravity of a black hole as it tore apart a star and gobbled up a...