Solar Corona
solar corona
[′sō·lər kə′rō·nə]Solar Corona
the outer and most extensive envelope of the sun. During total solar eclipses, the solar corona can be seen up to a distance of several diameters from the sun. In the short-wavelength part of the spectrum (λ < 200 A) and at meter wavelengths, all the radiation of the sun originates in the corona.