<prompt> Qedela le nkulumo elandelayo: Ukuthola kukaHubble izinkanyezi ezingu - 11 eziguquguqukayo ze - Cepheid kwakuyisenzakalo esiyingqopha - mlando kwezesayensi yezinkanyezi. Esebenzisa ubudlelwane be-Cepheid Period-Luminosity, uHubble wanquma ibanga elingu-. Lolu kwakuwuhlelo lokuqala olwalungaphandle kwamafu kaMagellanic olwalunqunywe ibanga lalo. I - Hubble yaqhubeka nale nqubo nge - Andromeda Galaxy ne - Triangulum Galaxy. Ukude kwakhe nomthala kwakungaphezu kakhulu kwenani likaHarlow Shapley leminyaka yokukhanya engu-300 000 ngobukhulu bendawo yonke. Kuleli phepha, uHubble waphetha ngokuthi  <response>: I-Great Debate yango-1920 phakathi kukaHeber Curtis noShapley ngesilinganiso sendawo yonke nemvelo ye-nebula ejikelezayo. Ngokushesha kwaba sobala ukuthi yonke imijikelezo yemithala enezingqimba eziyizigaxa empeleni yayiyimithala enezingqimba eziyizigaxa engaphandle kakhulu komthala wethu i-Milky Way. 