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pierredv : cosmology   18

Exclusive: Grave doubts over LIGO's discovery of gravitational waves | New Scientist Nov 2018
“We believe that LIGO has failed to make a convincing case for the detection of any gravitational wave event,” says Andrew Jackson, the group’s spokesperson. According to them, the breakthrough was nothing of the sort: it was all an illusion.
LIGO  gravity  cosmology  experiment  NewScientist  physics 
april 2019 by pierredv
The Cosmic Gift of Neutron Stars -- Victoria Kaspi -- Perimeter Institute lecture , Feb 2016
In her Feb. 3 talk, Dr. Victoria Kaspi of McGill University, explored neutron stars -- mysterious celestial objects can shed light on some of the most vexing questions in the universe.
science  lectures  video  PerimeterInstitute  astronomy  cosmology 
april 2016 by pierredv
25Sep14: Multiverse me: Should I care about my other selves? New Scientist #2988
Very well written discussion of moral-philosophical implications of multiple universes, quoting Tegmark and Deutsch
NewScientist  cosmology  quantum-mechanics  philosophy  physics  religion  morality  parallel.universes  multiverse  probability  risk  *  ethics 
november 2014 by pierredv
The asymmetric Universe | Royal Society - Frank Close
"Modern scientific theory describes a perfectly symmetrical Universe. A Universe in which matter is destroyed within an instant of its appearance and where nothing we now know could ever have happened. Human life itself seems to be lopsided, as the spherical embryo is transformed into a highly structured being with its internal organs mirrored asymmetrically. This talk explores the profound role of asymmetry in nature, and the role of its agent - the Higgs Boson - in creating a Universe fit for life. The Royal Society Michael Faraday Prize is awarded annually to the scientist or engineer whose expertise in communicating scientific ideas in lay terms is exemplary. Professor Frank Close OBE was presented the award for his excellence in science communication."
RoyalSociety  video  physics  cosmology  lectures 
july 2014 by pierredv
Hubble Ultra Deep Field in #D
"animation that was rendered using the measured redshift of all 10,000 galaxies in the Hubble Ultra Deep Field image"
youtube  video  visualization  Hubble  astronomy  science  cosmology 
june 2014 by pierredv
Model Universe recreates evolution of the cosmos : Nature News & Comment May 2014
Work by Mark Vogelsberger et al, MIT "Can current theories of cosmology explain how the Universe evolved? One way to find out is to plug everything we think we know about the early Universe and how galaxies form into a supercomputer, and see what comes out. In a simulation presented today in Nature1, researchers did just that — and revealed a cosmos that looks rather like our own. The findings lend weight to the standard model of cosmology, but could also help physicists to probe where our models of galaxy formation fall down."
cosmology  universe  modeling  simulation  mirror-worlds  NatureJournal 
may 2014 by pierredv
The imperfect universe: Goodbye, theory of everything - opinion - 10 May 2010 - New Scientist
Tagline: The quest for an ultimate theory is driven by the same urges as religion – we should stop searching for nature's hidden code, says Marcelo Gleiser Suggests that the fruitless search for GUTs is analogous to religion: "fundamentally misguided? Could belief in a physical theory that unifies the secrets of the material world - a "hidden code" of nature - be the scientific equivalent of the religious belief in oneness held by the billions who go to churches, mosques and synagogues every day?"
religion  cosmology  science  **  NewScientist 
july 2010 by pierredv
Why Einstein was wrong about relativity - 29 October 2008 - New Scientist
Mark Buchanan on Mitch Feigenbaum's work, which starts with Galileo and derives special relativity without Einstein's second assumption, that light always travels at the same speed relative to any observer. It involves working through relative rotations in different frames which are allowed but which Galileo ignored: "The possibility of such rotations turns out to have far-reaching consequences. Ignore them, and Galileo's relativity pops out. Allow them, and the algebra works out very differently: the mangled space-time of Einstein's relativity emerges, complete with a definite but unspecified maximum speed that the sum of individual relative speeds cannot exceed." Also covers Gorini and Kamenshchik's derivation of the cosmological constant: "Follow the mathematics of relativity through to its logical conclusion, allowing for displacements that add up in different ways, and you find that space must have just the curvature that a cosmological constant helps to produce."
**  science  physics  NewScientist  cosmology 
january 2009 by pierredv

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