Stellar corona

In astronomy, a corona (pl.: coronas or coronae) is the outermost layer of a star's atmosphere. It is a region filled with relatively hot, tenuous plasma that is structured by the star's magnetic field.

Scientists have greater access to the solar corona than they do to other stellar coronae, since it is inside our solar system. This means that the coronae of other stars are still relatively poorly understood.

Corona (Latin for 'crown') is, in turn, derived from Ancient Greek κορώνη (korṓnē) 'garland, wreath'.

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