Bars waxaa laga helaa inta u dhaxaysa saddex meelood meel iyo laba meelood meel dhammaan galaxyada ku wareegsan. Bars guud ahaan saameeyaan dhaqdhaqaaqa xiddigaha iyo gaaska interstellar gudahood galaxyada ku wareegsan iyo sidoo kale saameyn ku yeelan karaan gacmaha ku wareegsan. Galaxy Milky Way, halkaas oo our nidaamka Solar u gaar ah waxa uu ku yaalaa, waxaa lagu kala saaraa sida galaxy ku wareegsan ku wareegsan. Edwin Hubble galaxy ku wareegsan ee noocan ah sida "SB" (ku wareegsan, ku wareegsan) in uu taxanaha Hubble oo u kala saaray qaybo hoosaad ku salaysan sida ay u furan yihiin gacmaha galaxy ku wareegsan ee.
Edwin Hubble