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Holes in the Sun's Corona

Published by Matt on Wed Jan 12, 2011 11:15 am via: NASA
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This Solar Dynamics Observatory image of the Sun taken on January 10 in extreme ultraviolet light captures a dark coronal hole just about at sun center. Coronal holes are areas of the Sun’s surface that are the source of open magnetic field lines that head way out into space. They are also the source regions of the fast solar wind, which is characterized by a relatively steady speed of approximately 800 km/s (about 1.8 million mph).

This Solar Dynamics Observatory image of the Sun taken on Jan. 10, 2011, in extreme ultraviolet light captures a dark coronal hole just about at Sun center. Credit: NASA/SDO/AIA

This Solar Dynamics Observatory image of the Sun taken on Jan. 10, 2011, in extreme ultraviolet light captures a dark coronal hole just about at Sun center. Credit: NASA/SDO/AIA

As the sun continues to rotate, the high speed solar wind particles blowing from this hole will likely reach Earth in a few days and may spark some auroral activity.

The timelapse video below shows the coronal hole moving into full view.

1 Comments
The sun is about 93 million miles away. When the sun has a bad weather day, though, the Earth feels it. I found this here: Solar Flare 2011: X-class flare may shut down communications The first major 2011 solar flare storm is wreaking havoc across the world. Though the solar flare is causing beautiful Northern Lights, the negative effects are frustrating.
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