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  • How it started

    How it started

    In 1899, five years after establishing the first Bulgarian astronomical observatory in Sofia,Marin Bachevarov started regular sunspot observations with his students with the foremost telescope in Bulgaria – a 6-inch refractor [1] . In the mid-XXth century Angel Bonov lays the foundation of solar physics in Bulgaria with hisstudies on the 22- [2] , 44-…