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#Natural phenomena #Circles #Letters or numerals forming geometrical figures, written or typographical matter in perspective #Letters presenting a special form of writing #Luminous sources, rays, shafts of light #Circles containing representations of heavenly bodies or natural phenomena #Circles containing other figurative elements #Circles containing one or more letters #Circles with dark surfaces or parts of surfaces #Letters or numerals forming a circle or a circumference #Letters or numerals forming a figure in the shape of an arc of a circle #Letters in light-coloured characters on a dark background