<prompt> Qedela le nkulumo elandelayo: Ukutholwa kwakhe kwanikeza izazi zezinkanyezi ikhandlela elivamile lokuqala elalingasetshenziswa ekulinganiseni ibanga eliya emithaleni ekude. Ngokushesha ama-cepheid atholakala kweminye imithala, njenge-Andromeda ikakhulukazi u-Edwin Hubble ngo-192324, futhi aba yingxenye ebalulekile yobufakazi bokuthi ama-spiral nebulae yimithala ezimele etholakala kude ngaphandle kweMilky Way yethu. Ukutholakala kukaLeavitt kwanikeza isisekelo sokushintsha okukhulu kwezinto ezisemkhathini, njengoba kwashukumisela uHarlow Shapley ukuba asuse iLanga lethu enkabeni yomthala wethu  <response>: I-Great Debate ne-Hubble ukuze isuse umbuthano wethu wesibhakabhaka enkabeni yendawo yonke. Njengoba ubuhlobo besikhathi sokukhanya kwakunikeza indlela yokulinganisa ngokunembile amabanga esikalini esiphakathi kwemithala, kwaqala inkathi entsha yesayensi yezinkanyezi yanamuhla ngokuqonda ukwakheka nesilinganiso sendawo yonke. Ukutholakala kwendawo yonke ekhulayo nguGeorges Lemaitre noHubble kwenzeka ngenxa yocwaningo lukaLeavitt olusha. Ngokuvamile uHubble wayethi uLeavitt wayekufanelekela ukuthola uMklomelo KaNobel ngomsebenzi wakhe, futhi eqinisweni wamiswa yilungu leSweden Academy of Sciences ngo-1924, nakuba njengoba ayeshone ngomdlavuza eminyakeni emithathu ngaphambili wayengakufanelekeli. Umklomelo kaNobel awunikelwa ngemva kokufa. 