Dark energy DOES exist and it's increasingly driving our universe apart, scientists claim. By Daily Mail Reporter Updated: 17:14 GMT, 20 May 2011 Dark energy is driving our universe apart at accelerating speeds, according to a five-year survey of 200,000 galaxies, stretching back seven billion years in cosmic time.
The study offers new support for the favoured theory of how dark energy works - as a constant force, uniformly affecting the universe and propelling its runaway expansion. Its findings are based on results from Nasa's space-based Galaxy Evolution Explorer and the Anglo-Australian Telescope on Siding Spring Mountain in Australia. Scientists measured the separations between pairs of galaxies and observed that dark energy (represented by purple grid) is a smooth, uniform force that dominates over the effects of gravity (green grid) But they contradict an alternate theory, where gravity, not dark energy, is the force pushing space apart. 'The results tell us that dark energy is a cosmological constant, as Einstein proposed.
Is the Universe Infinite? The Great Dark Cosmic Side Coincidence. [Earthlit Moon: Dorst/Druckmüller] One of the biggest mysteries — and wonders — in the known Universe flies over our heads every day.
Or night, to be more precise. Alas, few human beings ever come to realize these questions even exist, much less ponder about them. Although often quoted polls suggest some people are still in the Middle Ages, most do know that planets are more or less spherical and revolve around the Sun. Or at least that they are not just points of light on a celestial bowl over a Flat Earth. The Universe - Solved. Enigma: Black Holes Glow with a Hot Ring of Light. Stephen Hawkings great discovery was that the mysterious regions in space we call black holes radiate heat through quantum effects.
NASA discovers brand new force of nature. Could the Universe Be A Giant Quantum Computer? MIT scientist Seth Lloyd proposes that information is a quantifiable physical value, as much as mass or motion -that any physical system--a river, you, the universe--is a quantum mechanical computer.
Lloyd has calculated that "a computer made up of all the energy in the entire known universe (that is, within the visible “horizon” of forty-two billion light-years) can store about 1092 bits of information and can perform 10105 computations/second. " The universe itself is a quantum computer, he says, and it has made a mind-boggling 10122 computations since the Big Bang (for that part of the universe within the “horizon”). In Year Million: Science at the Far Edge of Knowledge, Leading and up-and-coming scientists and science writers cast their minds one million years into the future to imagine the fate of the human and/or extraterrestrial galaxy. First attempted by H. G. Lloyd has proposed that a black hole could serve as a quantum computer and data storage bank.
10 Strange Things About The Universe. Space The universe can be a very strange place.
While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? 273.15°C, where the motion of all particles stops completely. However, you can never actually cool something to this temperature because, in quantum mechanics, every particle has a minimum energy, called “zero-point energy,” which you cannot get below.
January 6, 2011 - Fermi's Large Area Telescope Sees Surprising Flares in Crab Nebula. Menlo Park, Calif.
—The Crab Nebula, one of our best-known and most stable neighbors in the winter sky, is shocking scientists with its propensity for fireworks—gamma-ray flares set off by the most energetic particles ever traced to a specific astronomical object. The discovery, reported today by scientists working with two orbiting telescopes, is leading researchers to rethink their ideas of how cosmic particles are accelerated. "We were dumbfounded," said Roger Blandford, who directs the Kavli Institute for Particle Astrophysics and Cosmology, jointly located at the Department of Energy's SLAC National Accelerator Laboratory and Stanford University. "It's an emblematic object," he said. The Crab Nebula, also known as M1, was the first astronomical object catalogued in 1771 by Charles Messier.
Epic Discovery: Ancient Light from a Massive Black Hole Reveals New, Unknown History of Universe. Physical Review Focus. +Enlarge image Todd Mason, Mason Productions Inc.
/LSST Corp. An Ancient Subatomic Signature Extends Across the Universe: Relic Particles 10 Billion Light-Years in Length Discovered. An ancient subatomic signature extends across the universe.
It seems that some subatomic particles, invisible and untouchable effects of the very creation of reality, might exist simultaneously across all of space. "Relic" neutrinos, like the relic photons that make up the cosmic microwave background, are leftovers from the hot, dense early universe that prevailed 13.7 billion years ago. But over the lifetime of the cosmos, these relic neutrinos have been stretched out by the expansion of the universe, enlarging the range in which each neutrino can exist. Of course there's a little bit of physics involved when you talk about particles pouring out of the beginning of time. Neutrinos are tiny, almost undetectable neutral particles which stream through pretty much everything, ever. "We're talking maybe up to roughly ten billion light-years" for each neutrino, said study co-author George Fuller of the University of California, San Diego. Scientists glimpse 'dark flow' lurking beyond the edge of the universe.
The Universes of Max Tegmark. Is the Universe Actually Made of Math? Novikov self-consistency principle. Wheeler–Feynman absorber theory. The Wheeler–Feynman absorber theory (also called the Wheeler–Feynman time-symmetric theory) is an interpretation of electrodynamics derived from the assumption that the solutions of the electromagnetic field equations must be invariant under time-reversal symmetry, as are the field equations themselves.
Indeed, there is no apparent reason for the time-reversal symmetry breaking which singles out a preferential time direction and thus makes a distinction between past and future. A time-reversal invariant theory is more logical and elegant. Another key principle, resulting from this interpretation and reminiscent of Mach's principle due to Tetrode, is that elementary particles are not self-interacting. This immediately removes the problem of self-energies. This theory is named after its originators, the late physicists Richard Feynman and John Archibald Wheeler. T-symmetry and causality and point , which will arrive at point. Rotation.pdf (application/pdf Object) Comoving distance. Comoving coordinates While general relativity allows one to formulate the laws of physics using arbitrary coordinates, some coordinate choices are more natural (easier to work with).
Comoving coordinates are an example of such a natural coordinate choice. They assign constant spatial coordinate values to observers who perceive the universe as isotropic. Such observers are called "comoving" observers because they move along with the Hubble flow. Intelligent Design of the Universe? or non-designed Multiverse? Physics Letters B : The holographic dark energy in non-flat Brans–Dicke cosmology. Black Hole Computers. Decoding the universe: how the new ... The Ultimate Laptop: A Black Hole. New York Times, September 5, 2000 By GEORGE JOHNSON For all the corporate enthusiasm over the unveiling of each new generation of computer chip (last month Intel announced that its Pentium 4 would be packed with 42 million transistors performing as many as 8.4 billion operations per second), consumers may be more apt to feel a sense of dread.
Once again the expensive desktop computers and laptops they were so proud of have become outmoded, destined to join the scrap piles of unsalable equipment accumulating in closets everywhere. Moore's law, which holds that computing power doubles approximately every 18 months, sometimes seems less a blessing than a curse. But the law cannot hold forever, and Dr. In a paper in the current issue of Nature, Dr. If that sounds like a rather dangerous device to hold on one's lap -- "Opening the lid," Dr. Nothing like Lloyd's Ultimate Laptop is likely to roll off the assembly line at some future Apple or I.B.M.
Thomas J. Dr. Here Dr. Until this point, Dr. Black_Hole_Computers.pdf (application/pdf Object) Sun Professor Brian Cox on the highest energy explosion ever seen. Supersymmetry, Extra Dimensions and the Origin of Mass. The Universe: Beyond the Big Bang. Why Our Universe Must Have Been Born Inside a Black Hole. “Accordingly, our own Universe may be the interior of a black hole existing in another universe.” So concludes Nikodem Poplawski at Indiana University in a remarkable paper about the nature of space and the origin of time. The idea that new universes can be created inside black holes and that our own may have originated in this way has been the raw fodder of science fiction for many years. But a proper scientific derivation of the notion has never emerged. Today Poplawski provides such a derivation.