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Betelgeuse in the Orion Hunter Constellation is About to Hit a Cosmic Wall
Ms Sans Serif
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[quote:Anonymous Coward 865798:MV8yMTIzMDQ1XzM1ODIzOTMzXzZCMzNCREUz] http://www.godlikeproductions.com/forum1/message1866640/pg1 [quote:Septenary Man:MV8xODY2NjQwX0YzNENCQTUx] UPDATE :rockon: Jun 15, 2012 [i][b]Data from NASA's Voyager 1 spacecraft indicate that the venerable deep-space explorer [color=red]has encountered a region in space where the intensity of charged particles from beyond our solar system has markedly increased.[/color][/b] Voyager scientists looking at this rapid rise draw closer to an inevitable but historic conclusion - that humanity's first emissary to interstellar space is on the edge of our solar system. [b]"The latest data indicate that we are clearly [color=red]in a new region where things are changing more quickly. [/color]It is very exciting. We are approaching the solar system's frontier."[/i][/b] [i]This marked increase is one of a triad of data sets which need to make significant swings of the needle to indicate a new era in space exploration.[b] The second important measure from the spacecraft's two telescopes [color=red]is the intensity of energetic particles generated inside the heliosphere, the bubble of charged particles the Sun blows around itself.[/color][/b][/i] http://www.space-travel.com/reports/Data_From_Voyager_1_Points_To_Interstellar_Future_999.html _______________________________________ [i]IBEX’s novel imaging technique has unleashed one surprise after another. Now principal investigator David McComas (Southwest Research Institute) and 10 colleagues have turned IBEX's attention to the Sun's motion through space.[b] It turns out that the Sun is moving through interstellar gas at 52,000 miles (84,000 km) per hour, about 12% slower than previously measured by the Ulysses spacecraft.[/b] So what does the new model look like? IBEX's observations confirm that the S[b]un is still moving (albeit slowly) through the Local Interstellar Cloud, a fluff of higher density gas roughly 30 light-years across. Combined with a relatively strong interstellar magnetic field, the Sun's slower advance is no longer enough to push interstellar gas into a bow shock. At best, it makes a "bow wave," a region of slightly increased density [/b]— more like a fast-moving boat than a fighter jet. This means a significant change in how scientists think about the Sun and its interaction with the stuff beyond its influence. "It's too early to say exactly what this new data means for our heliosphere. [b]Decades of research have explored scenarios that included a bow shock. That research now has to be redone using the latest data," says McComas.[/b] [b]"Observations of a few astrospheres have shown bow shocks around those stars, but IBEX has shown that our star has a fundamentally different environment surrounding it,"[/b] says Christina Prested (Boston University), an IBEX scientist not involved in the published study. "These results are very exciting as we can now definitively say what it's like in the neighborhood of our solar system."[/i] http://www.skyandtelescope.com/community/skyblog/newsblog/IBEX-Shows-a-Slower-Sun-150955205.html [/quote] [/quote]
Roughly 1000 times the diameter of our Sun and shining 100 000 times more brightly, Betelgeuse's impressive statistics come with a cost. For this star is likely on its way to a spectacular supernova explosion, having already swelled into a red supergiant and shed a significant fraction of its outer layers...
...The new far-infrared view from Herschel shows how the star's winds are crashing against the surrounding interstellar medium, creating a bow shock as the star moves through space at speeds of around 30 km/s...
... An intriguing linear structure is also seen further away from the star, beyond the dusty arcs. While some earlier theories proposed that this bar was a result of material ejected during a previous stage of stellar evolution, analysis of the new image suggests that it is either a linear filament linked to the Galaxy's magnetic field,
or the edge of a nearby interstellar cloud that is being illuminated by Betelgeuse.
If the bar is a completely separate object, then taking into account the motion of Betelgeuse and its arcs and the separation between them and the bar, the outermost arc will collide with the bar in just 5000 years, with the red supergiant star itself hitting the bar roughly 12 500 years later.
link to www.spacedaily.com
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