1024 eters ~100 million light-years 亿光年 We look toward our distant home in the Milky Way.But we sec mostly one large intervening cluster of galaxics,called the Virgo Cluster.Galaxies as a rule associate into orbiting dusters and groups.There is reason to believe that our Milky Way is itself an ouclier of the big Virgo Cluster,responsive to its steady gravicational pull:part of a supercluster.Out there beyond the Milky Way is a good-sized volume nearly devoid of noticeable galaxies. mgP.C▣m一 亿 光 年