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Blogs > loveisamyth > loveisamyth, stars are forever


loveisamyth 68M
849 posts
4/18/2015 8:23 am

Last Read:
4/21/2015 6:35 am
CORONAL HOLE
NASA's Solar Dynamics Observatory, SDO, is monitoring a hole in the sun's atmosphere, a "coronal hole." It is colored deep blue in this extreme UV image of the sun taken by SDO on April 17th.



Coronal holes are places where the sun's magnetic field opens up and allows solar wind to escape. In the image, above, the sun's magnetic field is traced by white loops. Arrows show the flow of material out of the hole.

Holes in the sun's atmosphere are not unusual; they appear several times each month. A stream of solar wind flowing from this particular coronal hole will probably reach Earth on April 21-22. This means we could have auroras for Earth Day.



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