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    Auroras tagged posts

    Deadly Stars: Our Sun could also be Superflare Star

    March 24, 2016, Categories  Astronomy/Space

    The Sun. Elements of this image furnished by NASA. The Sun is capable of producing monstrous eruptions that can break down radio communication and power supplies here on Earth. The largest observed eruption took place in September 1859, where gigantic amounts of hot plasma from our neighboring star struck the Earth. Credit: © Vadimsadovski / Fotolia

    The Sun. Elements of this image furnished by NASA. The Sun is capable of producing monstrous eruptions that can break down radio communication and power supplies here on Earth. The largest observed eruption took place in September 1859, where gigantic amounts of hot plasma from our neighboring star struck the Earth. Credit: © Vadimsadovski / Fotolia

    Every now and then large sun storms strike the Earth where they cause aurora and in rare cases power cuts. These events are, however, nothing compared to the apocalyptic destruction we would experience if the Earth is struck by a superflare. An international research team has now shown that this is a scenario we may have to consider a real possibility.

    Superflares have been a mystery since the Kepler mission discovered them in larger numbers 4...

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    Auroral Mystery Solved: Sudden Bursts caused by Swirling Charged Particles

    December 21, 2015, Categories  Astronomy/Space

    On the left is and aurora oval before the auroral breakup occurs On the right is a supercomputer simulation reveals how auroral breakups develop Hot charged particles, or plasmas, gather in near-Earth space -- just above the upper atmosphere of the polar region -- when magnetic field lines reconnect in space. This makes the plasma rotate, creating a sudden electrical current above the polar regions. Furthermore, an electric current overflows near the bright aurora in the upper atmosphere, making the plasma rotate and discharge the extra electricity. This gives rise to the 'surge', the very bright sparks of light that characterize substorms. Credit: Kyoto University

    On the left is and aurora oval before the auroral breakup occurs On the right is a supercomputer simulation reveals how auroral breakups develop Hot charged particles, or plasmas, gather in near-Earth space – just above the upper atmosphere of the polar region – when magnetic field lines reconnect in space. This makes the plasma rotate, creating a sudden electrical current above the polar regions. Furthermore, an electric current overflows near the bright aurora in the upper atmosphere, making the plasma rotate and discharge the extra electricity. This gives rise to the ‘surge’, the very bright sparks of light that characterize substorms. Credit: Kyoto University

    A supercomputer model revealed the rotation of plasma creates electrical currents in the near-Earth space, ultimately triggering...

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