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Keyword: anisotropy

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  • Rethinking relativity: Is time out of joint?

    11/02/2009 9:29:43 PM PST · by Kevmo · 58 replies · 2,519+ views
    New Scientist ^ | 21 October 2009 | Rachel Courtland
    Rethinking relativity: Is time out of joint? EVER since Arthur Eddington travelled to the island of Príncipe off Africa to measure starlight bending around the sun during a 1919 eclipse, evidence for Einstein’s theory of general relativity has only become stronger. Could it now be that starlight from distant galaxies is illuminating cracks in the theory’s foundation? .... Yet it is still not clear how well general relativity holds up over cosmic scales, at distances much larger than the span of single galaxies. Now the first, tentative hint of a deviation from general relativity has been found. While the evidence...
  • Gamma-ray burst restricts ways to beat Einstein's relativity

    10/29/2009 6:58:41 PM PDT · by SunkenCiv · 15 replies · 963+ views
    Symmetry ^ | Thursday, October 29, 2009 | David Harris
    When the Fermi team did the calculations, using the most conservative estimates for how astrophysics plays into this, they determined that the mass scale must be at least 1.2 times the Planck mass, and by using reasonable but less conservative assumptions, they derived lower limits on the mass scale of up to 100 times the Planck mass. One way to interpret this is to say that there is no variation of the speed of light coming from any quantum gravity effects at less than 1.2 times the Planck mass. And given that some quantum gravity frameworks predict that effects should...
  • ‘Non-discovery’ of space-time ripples opens door to birth of the Universe

    08/19/2009 7:20:29 PM PDT · by bruinbirdman · 89 replies · 2,826+ views
    The Times ^ | 8/20/2009 | Mark Henderson
    Scientists have peered further back in time than ever before using instruments designed to search for a phenomenon predicted by Albert Einstein almost a century ago but not yet proven to exist. An American observatory hunting for ripples in space and time called gravitational waves has produced its most significant results yet, despite not having directly detected any. Tycho's Supernova The “non-discovery” offers insights into the state of the Universe just 60 seconds into its existence. Previous research has been unable to look back in time further than about 380,000 years after the big bang. The new window on the...
  • Re-Analysis of the Marinov Light-Speed Anisotropy Experiment

    06/12/2009 11:25:41 PM PDT · by Kevmo · 27 replies · 1,653+ views
    Re-Analysis of the Marinov Light-Speed Anisotropy Experiment Reginald T. Cahill School of Chemistry, Physics and Earth Sciences, Flinders University, Adelaide 5001, Australia E-mail: Reg.Cahill@flinders.edu.au The anisotropy of the speed of light at 1 part in 10^3 has been detected by Michelson and Morley (1887), Miller (1925/26), Illingworth (1927), Joos (1930), Jaseja et al. (1964), Torr and Kolen (1984), DeWitte (1991) and Cahill (2006) using a variety of experimental techniques, from gas-mode Michelson interferometers (with the relativistic theory for these only determined in 2002) to one-way RF coaxial cable propagation timing. All agree on the speed, right ascension and declination of...
  • Inflation Hypothesis Doesn't Measure Up to New Data (growing body of evidence contradicts Big Bang)

    01/30/2009 10:54:50 AM PST · by GodGunsGuts · 497 replies · 6,868+ views
    ICR ^ | January 30, 2009 | Brian Thomas, M.S.
    Since the Big Bang story of the origin of the universe has been refuted by a host of external observations and internal contradictions,1 secular science has been forced to postulate additional, exceedingly improbable events to keep it afloat. One of these is “inflation,” which attempts to explain the apparent uniformity of the universe.2 But new observations by the Wilkinson Microwave Anisotropy Probe are forcing cosmologists to revamp inflation, at the cost of inventing yet another miraculous event to prop it up...