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  Coronal Hole Front And Center

Coronal Hole Front And Center
Image credit: NASA/SDO

Uploader comment: The dark area across the top of the sun in this image is a coronal hole, a region on the sun where the magnetic field is open to interplanetary space, sending coronal material speeding out in what is called a high-speed solar wind stream. The high-speed solar wind originating from this coronal hole, imaged here on October 10, 2015, by NASA's Solar Dynamics Observatory, created a geomagnetic storm near Earth that resulted in several nights of auroras.

   

 
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Waspie_Dwarf
October 14, 2015, 4:11 pm
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