Labels:bulletin board | encyclical | fence | pier | pole | sea | sky | skyscraper | water OCR: ietta 1912, while studying Leavitt discovered 81 property ofa particular bles stars known 8.s Cepheic The average brightness stars. Leavitt ded uced ver related to the period of heids which they vary bright var more quickly than ones Henrietta Leavitt's ior this 'period -luminosity mine allowed astrononers the distances to other longas the galaxies wer enough to resolve indiv Cepheid variables withi which determining the period Cerheids vary in bright studyin ables knowr Cephei averag whicl Henrietts tion luninosit long Cerheid with
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