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LeopoldS

BBC News - Speed-of-light experiments give baffling result at Cern - 5 views

www.bbc.co.uk/...science-environment-15017484

PHY physics Einstein

shared by LeopoldS on 22 Sep 11 - No Cached
  • LeopoldS on 22 Sep 11
     
    Sante, Luzi have a look at this???!!!
  • ...3 more comments...
  • Luís F. Simões on 23 Sep 11
     
    and here's the xkcd on it: http://xkcd.com/955/
  • Luzi Bergamin on 23 Sep 11
     
    And here's the arXiv paper http://arxiv.org/abs/1109.4897 Serious? Difficult to say. I'm theorist and can't really rate their measurement techniques. Certainly be cautious, mostly such things disappear faster than they appeared.
  • LeopoldS on 23 Sep 11
     
    it took them 3 years to "appear"!
  • Luzi Bergamin on 23 Sep 11
     
    Leo, you mean that they measured 3 years? That's not a point to criticize: since the only interaction of neutrinos with matter is the Weak Interaction (which is indeed very, very weak), it is extremely hard to get a reasonable statistic. By the same reason, it's essentially impossible to shield the experiment from the background. And this background (solar neutrinos, cosmic radiation neutrinos) is huge.
  • pacome delva on 28 Sep 11
     
    for sure a result to be taken seriously. It makes a buzz in my lab... but always be cautious with this kind of declaration, that hugely violates all physics we know and even most of the reasonable alternative theories... Remember the Pionneer anomaly for which it took almost ten years to set up that finally its a thermal effect.
Francesco Biscani

Found: first 'skylight' on the moon - space - 22 October 2009 - New Scientist - 2 views

www.newscientist.com/...irst-skylight-on-the-moon.html

moon

shared by Francesco Biscani on 28 Oct 09 - Cached
pacome delva liked it
  • A deep hole on the moon that could open into a vast underground tunnel has been found for the first time. The discovery strengthens evidence for subsurface, lava-carved channels that could shield future human colonists from space radiation and other hazards.
aborgg

Nuclear cycler: An incremental approach to the deflection of asteroids - 1 views

www.sciencedirect.com/...S0273117715008339

asteroid deflection nuclear explosions natural formation orbits technology space

shared by aborgg on 21 Jan 16 - No Cached
  • aborgg on 21 Jan 16
     
    This paper introduces a novel deflection approach based on nuclear explosions: the nuclear cycler. The idea is to combine the effectiveness of nuclear explosions with the controllability and redundancy offered by slow push methods within an incremental deflection strategy. The paper will present an extended model for single nuclear stand-off explosions in the proximity of elongated ellipsoidal asteroids, and a family of natural formation orbits that allows the spacecraft to deploy multiple bombs while being shielded by the asteroid during the detonation.
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