HALO
3. (Earth Sciences / Physical Geography) a circle of light around the sun or moon, caused by the refraction of light by particles of ice
4. (Astronomy) Astronomy a spherical cloud of stars surrounding the Galaxy and other spiral galaxies
CORONA
a. A faintly colored luminous ring appearing to surround a celestial body visible through a haze or thin cloud, especially such a ring around the moon or sun, caused by diffraction of light from suspended matter in the intervening medium. Also called aureole.
So you're right and wrong I guess...
