<prompt> Pedzisa mutsara unotevera: Panguva imwe cheteyo neiyi nzira inoshanduka-shanduka yokuongorora zvinhu zvose zvakasikwa, imwe nharo yave iripo kwenguva refu pamusoro pokuumbwa kwezvinhu zvose zvakasikwa yakanga yava kusvika pakuguma kwayo. Nyanzvi yezvomuchadenga yepaMount Wilson Harlow Shapley yakatsigira muenzaniso wenyika yose inoumbwa nesangano renyeredzi reMilky Way bedzi; nepo Heber D. Curtis akataura nokuda kwepfungwa yokuti nebulae dzinotenderera dzakanga dziri masangano enyeredzi ari oga sezvitsuwa zvenyika yose. Uyu musiyano wemafungiro wakasvika pakakwirira nesangano re  <response>: Gakava Guru musi wa 26 Kubvumbi 1920 pamusangano weU.S. National Academy of Sciences muWashington, D.C. Gakava rakagadziriswa apo Edwin Hubble akawana Cepheid Variables muAndromeda Galaxy muna 1923 na1924. Daro ravo rakasimbisa nebulae inodzungunyika iri kure zvikuru nomuganhu weMilky Way. 