Big mystery over Jupiter

Zahina Rishad

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  • Aug 14, 2009
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    jupiter-august-2009-no-seb-may-2010-lg.jpg


    In a development that has transformed the appearance of the solar system's largest planet, one of Jupiter's two main cloud belts has completely disappeared. "This is a big event," says planetary scientist Glenn Orton of NASA's Jet Propulsion Lab. "We're monitoring the situation closely and do not yet fully understand what's going on." Known as the South Equatorial Belt (SEB), the brown cloudy band is twice as wide as Earth and more than twenty times as long. The loss of such an enormous "stripe" can be seen with ease halfway across the Solar system.
    "In any size telescope, or even in large binoculars, Jupiter's signature appearance has always included two broad equatorial belts," says amateur astronomer Anthony Wesley of Australia.
    "I remember as a child seeing them through my small backyard refractor and it was unmistakable. Anyone who turns their telescope on Jupiter at the moment, however, will see a planet with only one belt--a very strange sight."


    http://www.spacedaily.com/reports/Big_Mystery_Jupiter_Loses_A_Stripe_999.html
     

    Zahina Rishad

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  • Aug 14, 2009
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    wesley_18may10.jpg


    Without the SEB present, Jupiter's Great Red Spot is surrounded by almost uninterrupted white. Anthony Wesley took this picture on May 18, 2010.

    Known as the South Equatorial Belt (SEB), the brown cloudy band is twice as wide as Earth and more than twenty times as long. The loss of such an enormous "stripe" can be seen with ease halfway across the solar system.
    "In any size telescope, or even in large binoculars, Jupiter's signature appearance has always included two broad equatorial belts," says amateur astronomer Anthony Wesley of Australia. "I remember as a child seeing them through my small backyard refractor and it was unmistakable. Anyone who turns their telescope on Jupiter at the moment, however, will see a planet with only one belt--a very strange sight."
    Wesley is a veteran observer of Jupiter, famous for his discovery of a comet hitting the planet in 2009. Like many other astronomers, he noticed the belt fading late last year, "but I certainly didn't expect to see it completely disappear," he says. "Jupiter continues to surprise."
    Orton thinks the belt is not actually gone, but may be just hiding underneath some higher clouds.


    http://science.nasa.gov/science-news/science-at-nasa/2010/20may_loststripe/
     

    Zahina Rishad

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    This isn’t the first time the SEB has faded out.


    “The SEB fades at irregular intervals, most recently in 1973-75, 1989-90, 1993, 2007, 2010,” says John Rogers, director of the British Astronomical Association’s Jupiter Section. “The 2007 fading was terminated rather early, but in the other years the SEB was almost absent, as at present.”
    The return of the SEB can be dramatic.


    “We can look forward to a spectacular outburst of storms and vortices when the ‘SEB Revival’ begins,” says Rogers. “It always begins at a single point, and a disturbance spreads out rapidly around the planet from there, often becoming spectacular even for amateurs eyeballing the planet through medium-sized telescopes.



    However we can’t predict when or where it will start. On historical precedent it could be any time in the next 2 years. We hope it will be in the next few months so that everyone can get a good view.
    “I’ll be watching every chance I get,” says Wesley. “The revival will likely be sudden and dramatic, with planet-circling groups of storms appearing over the space of just a week or so.”
    Indeed, says Orton, “anyone could be the first to spot the return of the SEB.”
     

    funkoluwa

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  • May 28, 2007
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    Yokohama Japan


    This isn’t the first time the SEB has faded out.


    “The SEB fades at irregular intervals, most recently in 1973-75, 1989-90, 1993, 2007, 2010,” says John Rogers, director of the British Astronomical Association’s Jupiter Section. “The 2007 fading was terminated rather early, but in the other years the SEB was almost absent, as at present.”
    The return of the SEB can be dramatic.


    “We can look forward to a spectacular outburst of storms and vortices when the ‘SEB Revival’ begins,” says Rogers. “It always begins at a single point, and a disturbance spreads out rapidly around the planet from there, often becoming spectacular even for amateurs eyeballing the planet through medium-sized telescopes.



    However we can’t predict when or where it will start. On historical precedent it could be any time in the next 2 years. We hope it will be in the next few months so that everyone can get a good view.
    “I’ll be watching every chance I get,” says Wesley. “The revival will likely be sudden and dramatic, with planet-circling groups of storms appearing over the space of just a week or so.”
    Indeed, says Orton, “anyone could be the first to spot the return of the SEB.”

    k den hopefully da super sized stripe will return