<prompt> Nyora kupfuurira kweiyi ndima - Muna 1920 gakava rakaitika pakati paHarlow Shapley naHeber Curtis The Great Debate  <response>: , pamusoro pechimiro cheMilky Way, spiral nebulae, uye ukuru hwezvinhu zvose zvakasikwa. Kuti atsigire kutaura kwake kwokuti Great Andromeda Nebula igwara renzou rokunze, Curtis akacherechedza kuoneka kwemigwagwa yakasviba yakafanana namakore eguruva muMilky Way, pamwe chete nokuchinja kunokosha kwaDoppler. 