<prompt> Pedzisa mashoko anotevera: Vanhu vasati vanzwisisa kuti kune mapoka enyeredzi akaita semichina inonzi spiral kunze kwenyeredzi yedu inonzi Milky Way, vaiwanzonzi spiral nebulae. Mubvunzo wokuti zvinhu zvakadaro zvaiva mapoka enyeredzi akaparadzana akazvimirira kuMilky Way here, kana kuti rudzi rwenyeredzi dzomumhepo dziripo mukati medenga redu, wakanga uri musoro wenyaya yacho.  <response>: Gakava Guru ra 1920, pakati paHeber Curtis weLick Observatory naHarlow Shapley weMt. Wilson Observatory. Nzvimbo yokucherechedza nyeredzi Kutanga muna 1923, Edwin Hubble akacherechedza misiyano yeCepheid mumakemikari anoverengeka, kubatanidza inonzi Andromeda Nebula, achiratidza kuti, chaizvoizvo, mapoka enyeredzi akazara ari kunze kweedu. Shoko rokuti spiral nebula kubvira ipapo harisashandiswi. 