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    The universe is expanding in all of the directions all of th - Forum

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    Forum moderator: arya, dethalternate  
    Forum » Main » Science, Astronomy, Nature » The universe is expanding in all of the directions all of th
    The universe is expanding in all of the directions all of th
    ManuDate: Friday, 30-September-2016, 1:04 AM | Message # 1
    --dragon lord--
    Group: undead
    Messages: 12824
    Status: Offline
    The universe is expanding in all of the directions all of the time

    The universe is expanding in all directions all at once, scientists have discovered. In fact, a study has shown there is just a one in 121,000 chance it is not uniform in its entire observable 93 billion light-years.

    Scientists from University College London and Imperial College London used maps of cosmic microwave background (CMB) radiation – the light that was produced just after the Big Bang – to look at the polarisation, or orientation, of light at our cosmic dawn.

    On a small scale, the universe appears disordered, with planetary systems making up larger galaxies that when put together become galaxy clusters. However, when we zoom out, the universe largely looks the same whichever way you look at it.

    However, there are some fluctuations in the CMB that could be the result of anisotropic expansion (where it expands in one direction more than another).

    Whether or not it is truly uniform will impact theories of the universe, including Einstein's field equations. If it rotates or is not uniform, its expansion would vary with direction and we would need to rethink some cosmological models like inflation.

    In their study, published in the journal Physical Review Letters, the team looked at a number of anisotropy models and found there is very little chance it is expanding in one way more than another.

    They instead showed the universe is almost uniform in its entirety, other than a few small fluctuations explained by the density of the universe. They varied the parameters of their model and compared it to data from European Space Agency's Planck satellite, which took measurements of CMB between 2009 and 2013.

    untotenawake
    Full article/source - http://www.ibtimes.co.uk/univers....1582997
     
    Forum » Main » Science, Astronomy, Nature » The universe is expanding in all of the directions all of th
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