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"Corona (a crown) in astronomy is a halo or luminous circle round one of the heavenly bodies; specifically the portion of the aureola observed during total eclipses of the sun, which lies outside the chromosphere or region of colored prominences. "—(Charles Leonard-Stuart, 1911)

Corona of the Sun

"Corona (a crown) in astronomy is a halo or luminous circle round one of the heavenly bodies; specifically…