The halo is a phenomenon seen in nature as a ring around the sun or moon, a result of refracted or reflected light. The corona (Latin for “wreath”) surrounding the sun during a total eclipse is similar. Any of these forms of halo may be called a nimbus (Latin for “cloud”). Some authorities suggest that these titles may be used interchangeably, along with aura, aureole, glory or gloriole (Latin: “a small glory”).