<prompt> Nyorera kupfuurira kweiyi ndima - Cepheids yakakurumidza kuonekwa mune mamwe mapoka enyeredzi, akadai saAndromeda kunyanya naEdwin Hubble muna 192324, uye vakava chikamu chinokosha cheuchapupu hwokuti spiral nebulae mapoka enyeredzi akazvimirira ari kure kunze kweMilky Way yedu pachedu. Nokudaro, kuwanwa kwaLeavitt kwaizochinja nokusingaperi mufananidzo wedu wechisiko chapose pose, sezvo kwakakurudzira Harlow Shapley kutamisa Zuva redu kubva pakati pegwara renzou muGreat Debate  <response>: naEdwin Hubble kuti vabvise boka redu renyeredzi pakati pezvose zvakasikwa. 