<prompt> Pedzisa mutsara unotevera:  <response>: Hurukuro Huru, Hubble naSlipher vakawana kuwedzera kwechisiko chose muma 1920 vachiyera redshifts yeDoppler spectra kubva kumagadziriro enyeredzi. Vachishandisa dzidziso yaEinstein yokuti zvinhu zvose zvakavapo nokukurumidza, Lemaître naGamow vakagadzira dzidziso yaizozivikanwa seBig Bang. Rwisano, inonzi rondedzero yenyika yakatsiga yakagadzirwa naHoyle, Gold, Narlikar naBondi. 