<prompt> Ramba uchinyora ndima iyi - Panguva imwe cheteyo neiyi nzira inoshanduka-shanduka yokudzidza nezvezvinhu zvose zvakasikwa, gakava rakanga ragara kwenguva refu pamusoro pokuumbwa kwezvinhu zvose zvakasikwa rakanga rava kusvika pakakwirira zvikuru. 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 mumaruramiro adzo amene sezvitsuwa zvenyika yose. Uyu musiyano wemifungo wakasvika pakakwirira nesangano reGreat Debate  <response>: musi wa 26 April 1920 pamusangano weU.S. National Academy of Sciences muWashington, D.C. Kukakavadzana kwakagadziriswa apo Edwin Hubble akawana Cepheid Variables muAndromeda Galaxy muna 1923 na1924. Daro ravo rakasimbisa nebulae inodzungunyika iri kure zvikuru nomuganhu weMilky Way. 