<prompt> I-Bars ngokuvamile ithinta ukunyakaza kwezinkanyezi kanye negesi yezinkanyezi ngaphakathi kwe-spiral galaxies futhi ingathinta izingalo ze-spiral. I-Milky Way Galaxy, lapho i-Solar System yethu itholakala khona, ihlukaniswa njenge-barred spiral galaxy. U-Edwin Hubble uhlukanise ama-spiral galaxies alolu hlobo ngokuthi SB spiral, barred ngokulandelana kwakhe kweHubble futhi wawahlela ngezigaba ezincane ngokusekelwe ekutheni izingalo ze-spiral zivulekile kangakanani. Izinhlobo ze-SBA zifaka izingalo eziqinile, kuyilapho izinhlobo ze-SB ziyi-SBc kwezinye izinhlobo futhi ziboshwe kancane. Izinhlobo ze-SB-type zixhunyiwe phakathi kwezinhlobo ezimbili ze-spiral galaxies futhi zingathinta izingalo ze-spiral galaxies. Phakathi kwezinhlobo ezimbili ze-spiral galaxies, i-Milky Way Galaxy, lapho kutholakala khona i-Solar System yethu, ihlukaniswa njenge-barred spiral galaxy. Umbuzo ka-Edwin Hubble, owatholwa kamuva,  <response>: U-Edwin Hubble 