<prompt> Pedzisa mutsara unotevera: Kuonekwa kwenyeredzi gumi nerimwe dzinosiyana-siyana dzeCepheid kwakaitwa neHubble kwaiva chiitiko chinokosha mune zvomuchadenga. Achishandisa ukama hweCepheid Period-Luminosity, Hubble akawana chinhambwe che. Iyi yakanga iri gadziriro yokutanga iri kunze kweMagellanic Clouds kuva nenhambwe yayo yakatarwa. Hubble akaenderera mberi nenzira iyi neAndromeda Galaxy neTriangulum Galaxy. Daro rake kugwara renzou rakanga riri kure zvikuru kupfuura ukoshi hwaHarlow Shapley hwemakore echiedza 300 000 nokuda kwokukura kwechisiko chose. Mupepa racho, Hubble akagumisa kuti  <response>: Gakava Guru ra1920 pakati paHeber Curtis naShapley pamusoro pechiyero chechisiko chose uye chimiro chespiral nebula. Nenguva isipi zvakava pachena kuti nebulae dzose dzakakombama dzaiva chaizvoizvo mapoka enyeredzi akakombama ari kure kunze kweMilky Way yedu timene. 