@Polaris 17 March 2021 more from that month

#Trivia : Atmospheric Optical Phenomena; Corona (diffraction ring around the Sun or Moon, not the corona composed of plasma surrounding the Sun) One or more diffuse concentric rings of light around the Sun or Moon, formed by diffraction of light as it moves through water droplets in the atmosphere; the rings may have more color than halos. In a corona the reddish tones are at the outer part of the rings. Coronas usually occur in the presence of thin clouds, but a particular type, known as the Bishop's ring corona, occurs in the absence of clouds. It is caused by scattering of light from very small (~ 1 micrometer, or 1/1000 of a mm) particles, usually stratospheric dust or ash or sulphate droplets from volcanic eruptions that are suspended in the atmosphere. Bishop's ring coronas can be larger than the usual coronas associated with thin clouds, which are smaller than halos. The central bright area of a corona is called the aureole. It appears as a whitish or bluish-white disk that fades to a pale reddish-brown toward the circumference of the disk. It may be the only visible part of the corona, particularly for those associated with the Moon. The aureole of a lunar corona can be enhanced if seen through a cloud layer that is not too thick and/or has breaks. In meteorology, a corona (plural coronae) is an optical phenomenon produced by the diffraction of sunlight or moonlight (or, occasionally, bright starlight or planetlight) by individual small water droplets and sometimes tiny ice crystals of a cloud or on a foggy glass surface. (1) https://rammb.cira.colostate.edu/dev/hillger/optical-phenomena.htm (2) https://en.m.wikipedia.org/wiki/Corona_(optical_phenomenon) Photos are not mine. Ctto #AstroNature