A Coronal Hole

A very large coronal hole rotated across the middle of the Sun to be in a position to affect Earth last week. In this animation of views by the Solar Dynamics Observatory in extreme ultraviolet light, the dark region shows where the magnetic field of the Sun was more open, emitting streams of high-speed solar wind. Over the next few days, this solar wind is likely to impact Earth’s magnetosphere and possibly cause displays of aurora.

[youtube http://www.youtube.com/watch?v=xNISXItrPLg]

Video Credit: NASA

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