<prompt> Nyora kupfuurira kweiyi ndima - Muna 1913, Ejnar Hertzsprung akaedza kuwana madaro ku13 Cepheids achishandisa kufamba mudenga. Zvisinei, kutsvakurudza kwake kwaizoda kudzokororwa gare gare. Muna 1918, Harlow Shapley akashandisa mapuraneti anonzi Cepheids kuisa miganhu yokutanga paukuru uye chimiro cheMilky Way, uye nzvimbo yeZuva redu mairi. Muna 1924, Edwin Hubble akagadza chinhambwe chemisiyano yeCepheid yekare muAndromeda Galaxy, kusvika panguva iyoyo yaizivikanwa se Andromeda Nebula, uye yakaratidza kuti misiyano yacho yakanga isiri nhengo yeMilky Way. Kuwana kwaHubble kwakagadzirisa mubvunzo wakamutswa muGreat Debate  <response>: kana Gwara Renzou raimiririra zvose zvakasikwa kana kuti raingova rimwe remapoka enyeredzi akawanda ari muZvakasikwa. 