English

Diagram of a star with two helmet streamers (A) and a coronal hole (B)

Noun

coronal hole ‎(plural coronal holes)

1. (astrophysics) A region in the corona of a star where magnetic field lines extend out into space, allowing solar wind to escape.

See also

• coronal mass ejection
• solar filament
• solar flare
• solar prominence
• superflare