<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: I-Passage: I-barred spiral galaxy iyinhlangano yezinkanyezi ezinemigoqo emise okwemigoqo eyakhiwe izinkanyezi. Imigoqo itholakala phakathi kwengxenye eyodwa kwezintathu nengxenye ezimbili kwezintathu yazo yonke imithala enezindilinga. Ngokuvamile imigoqo ithonya ukunyakaza kwezinkanyezi negesi ephakathi kwezinkanyezi ngaphakathi kwemithala enezigaxa futhi ingathinta nezingalo ezinemicu. Umthala i-Milky Way, lapho kutholakala khona iSimiso sethu Sokuziphendukela Kwemvelo, uhlukaniswa njengomthala onemigoqo. U-Edwin Hubble wahlukanisa imithala enemigoqo yalolu hlobo ngokuthi i-SB emigoqo, enemigoqo kulandelana kwakhe kweHubble futhi wayihlela yaba izigaba ezincane ngokususelwa ekutheni izingalo zomthala zivulekile kangakanani. Izinhlobo ze-SBa zinezingalo eziboshwe ngokuqinile, kuyilapho izinhlobo ze-SBc zikolunye uhlangothi futhi zinezingalo eziboshwe ngokuxekethile. Imithala yohlobo lwe-SBb iphakathi kwalezi ezimbili. I-SB0 iyinkanyezi enamachashazi. Uhlobo olusha, i-SBm, lwakhiwa kamuva ukuchaza imijikelezo enezihibe engajwayelekile, njengamafu kaMagellanic, ake ahlukaniswa njengeminyele engajwayelekile, kodwa kusukela lapho kutholakale ukuthi iqukethe izakhiwo ezinemigoqo. Phakathi kwezinye izinhlobo ezihlukanisweni zezinkanyezi zeHubble kunenkanyezi eyisiyingi, inkanyezi eyisiyingi ne-elliptical galaxy. Umbuzo: Ubani owahlela imithala emise okhalweni yaba izigaba ezincane?  <response>: U-Edwin Hubble 