<prompt> Qedela umusho olandelayo: Ngo-1920 uHeber Doust Curtis noHarlow Shapley babambe iqhaza  <response>: I-Great Debate ngesimo sama-nebula nemithala, nobukhulu bendawo yonke. UShapley wayekholelwa ukuthi ama - nebula akude ayemancane kakhulu futhi ayesemthaleni wethu i - Milky Way. UCurtis wakhuthaza umbono owamukelwayo manje wokuthi ama-nebula ayekude kakhulu, futhi ngenxa yalokho kwakukhona neminye imithala ngaphandle koMzila Wobisi. 