CORONAL HOLE TURNS TOWARD EARTH: A hole has opened in the sun's atmosphere, and it is spewing a stream of solar wind into space.  An extreme ultraviolet telescope onboard NASA's Solar Dynamics Observatory photographed the structure turning to face Earth on Jan. 23rd:
This is a "coronal hole" (CH)--a region in the sun's atmosphere where the magnetic field opens up and allows solar wind to escape to escape. A gaseous stream emerging from this coronal hole should reach Earth on or about Jan. 27th.  Arctic sky watchers, mark your calendars.  Auroras are in the offing later this week

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