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Huge tornadoes discovered on the Sun

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Posted in Science on 30th Mar, 2012 02:08 AM by AlexMuller

"This is perhaps the first time that such a huge solar tornado is filmed by an imager. Previously much smaller solar tornadoes were found my SOHO satellite. But they were not filmed," says Dr. Xing Li, of Aberystwyth University.

 

Dr. Huw Morgan, co-discover of the solar tornado, adds, "This unique and spectacular tornado must play a role in triggering global solar storms."

 


The Atmospheric Imaging Assembly saw superheated gases as hot as 50 000 – 2 000 000 Kelvin sucked from the root of a dense structure called prominence, and spiral up into the high atmosphere and travel about 200 000 kilometres along helical paths for a period of at least three hours. The tornadoes were observed on 25 September 2011.

 

The hot gases in the tornadoes have speeds as high as 300,000 km per hour. Gas speeds of terrestrial tornadoes can reach 150km per hour.

 

The tornadoes often occur at the root of huge coronal mass ejections. When heading toward the Earth, these coronal mass ejections can cause significant damage to the earth’s space environment, satellites, even knock out the electricity grid.

 

The solar tornadoes drag winding magnetic field and electric currents into the high atmosphere. It is possible that the magnetic field and currents play a key role in driving the coronal mass ejections.

 

SDO was launched in February 2010. The satellite is orbiting the Earth in a circular, geosynchronous orbit at an altitude of 36,000 kilometres. It monitors constantly solar variations so scientists can understand the cause of the change and eventuallyhave a capability to predict the space weather
 



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Comments

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