<prompt> Nyorai kupfuurira kweiyi ndima - Kuonekwa kwaHubble kwenyeredzi gumi nerimwe dzinoshanduka dzeCepheid kwakanga kuri 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 Great Debate  <response>: ra1920 pakati paHeber Curtis naShapley pamusoro pechiyero chechisiko chapose pose uye chimiro che nebula rinotenderera. Nenguva isipi zvakava pachena kuti nebulae dzose dzakakombama dzaiva chaizvoizvo mapoka enyeredzi akakombama ari kure kunze kweMilky Way yedu timene. 