Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A barred spiral galaxy ne mai karkace galaxy tare da tsakiya bar-dimbin yawa tsarin kunshi taurari. Ana samun sanduna a tsakanin kashi ɗaya bisa uku da kashi biyu bisa uku na dukan taurari masu kama da karkace. Bars gabaɗaya suna shafar motsin taurari da iskar gas tsakanin taurari a cikin galaxies masu juyawa kuma suna iya shafar makamai masu juyawa. Milky Way Galaxy, inda tsarinmu na Solar yake, an rarraba shi a matsayin galaxy mai tsaka-tsalle. Edwin Hubble ya rarraba galaxies masu tsaka-tsalle na wannan nau'in a matsayin "SB" (m, barred) a cikin jerin Hubble kuma ya shirya su cikin ƙananan rukuni bisa ga yadda aka buɗe makamai na dunƙule. Nau'ikan SBa suna da makamai masu ɗaure sosai, yayin da nau'ikan SBc suke a wani matsanancin kuma suna da makamai masu ɗaurewa. Galaxies na SBb-type suna tsakanin su biyun. SB0 wani tauraron dan adam ne mai tsattsauran ra'ayi. Wani sabon nau'in, SBm, an ƙirƙira shi daga baya don bayyana wasu nau'ikan da ba su dace ba, kamar su Magellanic Clouds, waɗanda aka taɓa rarraba su azaman galaxies marasa daidaituwa, amma tun daga wannan lokacin an gano cewa suna ƙunshe da tsarin barred spiral. Daga cikin sauran nau'ikan a cikin rarrabuwa na Hubble ga taurari sune galaxy mai juzu'i, elliptical galaxy da galaxy mara kyau.  Tambaya: Wanene ya tsara tauraron dan adam a cikin rukuni?
Edwin Hubble