Coronal Holes
Coronal holes are magnetically open areas on the Sun that allow high-speed solar wind to gush out into space. They appear dark in extreme ultraviolet (below). An Earth facing coronal hole produces auroras.
Coronal holes are magnetically open areas on the Sun that allow high-speed solar wind to gush out into space. They appear dark in extreme ultraviolet (below). An Earth facing coronal hole produces auroras.