<prompt> Pedzisa mutsara unotevera: Cepheids yakakurumidza kuonekwa mune mamwe mapoka enyeredzi, akadai seAndromeda kunyanya naEdwin Hubble muna 192324, uye vakava rutivi runokosha rweufakazi hwokuti spiral nebulae mapoka enyeredzi akazvimirira ari kure kunze kweMilky Way yedu timene. Nokudaro, kuwanwa kwaLeavitt kwaizochinja nokusingaperi mufananidzo wedu wechisiko chapose pose, sezvo kwakakurudzira Harlow Shapley kutamisa Zuva redu kubva pakati pegwara redu renzou mu  <response>: Great Debate naEdwin Hubble kuti vabvise renyeredzi yedu pakati pezvinhu zvose zvakasikwa. 