<prompt> Pedzisa mutsara unotevera: Muna 1920,  <response>: Kurukurirano huru pakati paHarlow Shapley naCurtis yakaitika pamusoro pomusikirwo weMilky Way, nebulae dzomumhepo, uye ukuru hwechisiko chose. Kuti atsigire kutaura kwake kwokuti Great Andromeda Nebula iri, chaizvoizvo, imwe nyeredzi yokunze, Curtis akacherechedzawo kuoneka kwemigwagwa yakasviba mukati meAndromeda iyo yakafanana nemakore eguruva mugwara redu renzou, pamwe chete nokucherechedza kwenhau kweDoppler shift inokosha yeAndromeda Galaxy. Muna 1922 Ernst Öpik akapa nzira yokufungidzira nayo chinhambwe cheAndromeda achishandisa kumhanya kwenyeredzi dzayo kwakayerwa. Mugumisiro wake wakaisa Andromeda Nebula kure kunze kwedenderedzwa redu renyeredzi pakureba kweanenge. Edwin Hubble akagadzirisa gakava racho muna 1925 paakaziva nyeredzi dzinosiyana-siyana dzinonzi Cepheid dzokunze kwemapoka enyeredzi kokutanga mumifananidzo yomuchadenga yeAndromeda. Izvi zvakagadzirwa pachishandiswa Hooker telescope, uye zvakaita kuti zvikwanisike kuziva chinhambwe cheGreat Andromeda Nebula. Kuyera kwake kwakaratidza zvakajeka kuti chinhu ichi chakanga chisiri boka renyeredzi negasi riri muGwara redu Renzou, asi kuti raiva renyeredzi yakasiyana nedzimwe iri kure zvikuru neGwara Renzou. 