For the first time, scientists have systematized all the halos discovered over thousands of years of observations

For the first time in the history of observations, scientists from the Helsinki and Ural Federal Universities, Jarmo Moilanen and Maria Gritsevich, have systematized information about all forms of atmospheric halos recorded by mankind at the end of 2021. From numerous sources of data on observations, the history of which includes 4-5 millennia, 119 different forms of atmospheric halo are known today. There are also extra-atmospheric halos and halos that can be seen on various surfaces. An article describing the work carried out and the conclusions reached was published in the Journal of Quantitative Spectroscopy and Radiative Transfer.

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