<prompt> Qhubeka ubhale lesi sigaba - Ukutholwa kwakhe kwanikeza izazi zezinkanyezi ikhandlela elivamile lokuqala elalingalinganisa ngalo 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. Ukutholwa kukaLeavitt kwanikeza isisekelo sokushintsha okuyisisekelo kwe-cosmology, njengoba kwashukumisela uHarlow Shapley ukuba asuse iLanga lethu enkabeni yomthala Emphikiswaneni Enkulu  <response>: neHubble ukuze asuse umthala wethu 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. 