![]() ![]() The researchers suggest that the key to the production of mysterious atmospheric halos could be ice crystals with anomalous shapes or crystals of other minerals scattered in the air. "Among the mysterious ones is the so-called Moilanen arc, which I first discovered in 1995." "The mysteries of the origin of elliptical halos and Bottlinger rings have not been solved since their discovery at the beginning of the 20th century," the researcher said. Moilanen, who developed the inventory of atmospheric halos with University of Helsinki professor, Maria Gritsevich, named some examples of such exotic halos. "However, some of the documented exotic halos cannot be explained in this way." student at the University of Helsinki, Jarmo Moilanen, said in a statement. "As a rule, halos are formed as a result of the interaction of light with hexagonal crystals of water ice," Finnish Geospatial Research Institute scientist and Ph.D. Halos seen at least once a year were defined as 'commonly observed' and are usually formed by the scattering, refraction and focusing of light from the sun or reflected off of the moon by hexagonal ice crystals in a disordered, horizontal, or vertical orientation.Īnother category - 'rare halos' - which includes atmospheric illusions accounting for only around one percent of all observations, is further divided into halos with known origins and those with unknown and exotic sources. A photo of a halo of diamond dust taken on Decemin Tampere, Finland.
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