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    Hidden Portals in Earth's Magnetic Field

    mudra
    mudra


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    Join date : 2010-04-09
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    Hidden Portals in Earth's Magnetic Field  Empty Hidden Portals in Earth's Magnetic Field

    Post  mudra Tue Jul 02, 2013 12:58 pm

    Hidden Portals in Earth's Magnetic Field

    June 29, 2012: A favorite theme of science fiction is "the portal"--an extraordinary opening in space or time that connects travelers to distant realms. A good portal is a shortcut, a guide, a door into the unknown. If only they actually existed....

    It turns out that they do, sort of, and a NASA-funded researcher at the University of Iowa has figured out how to find them.

    "We call them X-points or electron diffusion regions," explains plasma physicist Jack Scudder of the University of Iowa. "They're places where the magnetic field of Earth connects to the magnetic field of the Sun, creating an uninterrupted path leading from our own planet to the sun's atmosphere 93 million miles away."
    Hidden Portals (splash)

    A new ScienceCast video explains how hidden portals form--and how we can find them. Play it

    Observations by NASA's THEMIS spacecraft and Europe's Cluster probes suggest that these magnetic portals open and close dozens of times each day. They're typically located a few tens of thousands of kilometers from Earth where the geomagnetic field meets the onrushing solar wind. Most portals are small and short-lived; others are yawning, vast, and sustained. Tons of energetic particles can flow through the openings, heating Earth's upper atmosphere, sparking geomagnetic storms, and igniting bright polar auroras.

    read on and watch video here : http://science.nasa.gov/science-news/science-at-nasa/2012/29jun_hiddenportals/


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    mudra


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