Public domain
The Sun Forms a Question
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
Oddly enough, an elongated coronal hole (the darker area near the center) seems to shape itself into a single, recognizable question mark over the period of one day (Dec. 21-22, 2017). Coronal holes are areas of open magnetic field that appear darker in extreme ultraviolet light, as is seen here. These holes are the source of streaming plasma that we call solar wind. While this exercise is akin to seeing shapes in clouds, it is fun to consider what the sun might be asking?
NASA Image and Video Library’s own descriptionCredit lineThe Sun Forms a Question. NASA/JPL, 2017-12-29. Public domain. ID: PIA22197.
