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Coronal Hole All Spread Out
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
This image from NASA's Solar Dynamics Observatory shows a broad coronal hole was the dominant feature this week on the sun (Nov. 7-9, 2017). It was easily recognizable as the dark expanse across the top of the sun and extending down in each side. Coronal holes are magnetically open areas on the sun that allow high-speed solar wind to gush out into space. They always appear darker in extreme ultraviolet.
NASA Image and Video Library’s own descriptionCredit lineCoronal Hole All Spread Out. NASA/JPL, 2017-11-16. Public domain. ID: PIA22113.
