A fully developed corona is perhaps the finest form of aurora.
In architecture, the term "corona" is used of that part of a cornice which projects over the bed mould and constitutes the chief protection to the wall from rain; it is always throated, and its soffit rises towards the wall.
The corona civica, made of oak leaves with acorns, was bestowed on the soldier who in battle saved the life of a Roman citizen.
These coronagraphs produce images of the " emission line corona.
A superb image of the sun's corona, captured during the 1999 total eclipse.
