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Discovering the origin of Auroras Boreais
Filed Under (Space) by admin on 28-07-2008
Using the five satellites of the THEMIS mission and more a network of 20 ground observatories, located along the Canada and Alaska, the scientists finally desvendaram the mystery of the magnificent spectacle of Auroras Boreais.
Origin of Auroras Boreais
His home is in explosions of magnetic energy that occur to one third of the distance between Earth and the Moon, who feed these explosions “subtempestades” Shines causing sudden and rapid movements of Aurora Boreal, also known as the Northern Lights (Arctic) and Lights South (Antarctica).
The key element of the phenomenon is a process called magnetic reconnection, a process quite common, occurring in the entire universe where lines of magnetic fields under pressure suddenly assume a new format, as a rubber that has been stretched beyond its point of collapse .
“We discovered what makes the Northern Lights dance,” said Professor Vassilis Angelopoulos of the University of California, and coordinator of the studies.
Effects of space storms
The discovery has great interest to the telecommunications industry and distribution of electric energy. The subtempestades often accompany intense space storms that can disrupt radio communications and signals from GPS, and cause falls in the supply of energy.
Now that solved the mystery of where, when and how the subtempestades occur, the researchers can build models more realistic and provide the intensity and effects of each subtempestade.
Satellites synchronized
Launched in February 2007, the five identical satellites of the mission THEMIS (Time History of Events and Macroscale Interactions during Substorms) align themselves once every four days along the line of Ecuador and comments are synchronized with the 20 ground observatories.
Each ground station uses a magnetômetro and a camera pointing up to determine where and when a subtempestade Boreal vai begin. The instruments measure the light of auroras by particles streaming along the Earth’s magnetic field and electrical currents that these particles generated.
During each alignment, the satellites capture data that allow scientists to accurately point where, when and how the measures subtempestades land were developed by observatories in space.
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