Labels:bulletin board | encyclical | fence | pier | pole | poster | reckoner | sea | sidewalk | sky | skyscraper | water OCR: brightness" relationship true astronomer could calcul ormpar brightness of the star ing the true brightness bright the Cepheid appec nce to was eas to calculate the the star or anything inding Shapley was intereste the distance to globular seen Since RR Lyrae stars COU in globular clusters. Sha reasoned he could use itthad distance indicator, just used the Cepheids. But made a small mistake. rea lizing that RR Lvaes ieids, slightly differently frorm he overestimated the the globular clusters calcu briehtthe easy anythine globula Cerheids smali Lyraes fror elobular
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