Public domain
Emerging Coronal Hole
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
The Sun already featured one good-sized coronal hole, when another larger coronal hole began to emerge and intensify (Sept. 4-6, 2018). Coronal holes appear dark in extreme ultraviolet light, as is shown here. They are magnetically open areas from which solar wind streams out into space, and can last from days to months. The brighter area between the two coronal holes is an active region where the level of magnetic activity is strong.
NASA Image and Video Library’s own descriptionCredit lineEmerging Coronal Hole. NASA/JPL, 2018-09-17. Public domain. ID: PIA22722.
