solar dynamics observatory

solar dynamics observatory

NASA's SDO Reveals Huge 'Coronal Hole' on the Solar Surface

1d ago
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NASA's Solar Dynamics Observatory (SDO) is monitoring a huge hole in the sun's atmosphere--a "coronal hole." Coronal holes are places where the sun's magnetic field opens up and allows solar wind to escape. The wind speed can reach 500 miles (800 km) per second. A stream of solar wind flowing from this coronal hole will probably reach Earth on Aug. 28-29. Its impact could spark a geomagnetic storm at the end of this week. If so, bright moonlight will temper the visibility of any auroras. http://spaceweather.com/ These images were taken by NASA's SDO solar spacecraft. http://sdo.gsfc.nasa.gov/data/ Music credit: Hitman by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300013 Artist: http://incompetech.com/