<prompt> Qedela le nkulumo elandelayo: Ngaphambi kokuba kube khona isayensi yesimanje yezinkanyezi nomhlaba, kwakukhulunywa kakhulu ngosayizi nokuma kwendawo yonke. Ngo - 1920, i -  <response>: Ingxoxo-mpikiswano kaShapley noCurtis yenzeka phakathi kukaHarlow Shapley noHeber D. Curtis ngalolu daba. UShapley wagomela ngokuthi indawo yonke incane ngangomthala iMilky Way, kanti uCurtis wagomela ngokuthi indawo yonke inkulu kakhulu. Le nkinga yaxazululwa eminyakeni eyishumi eyalandela ngokuthuthukiswa kokubuka kweHubble. 