It seems that our venerable Milky Way Galaxy is part of a much larger agglomeration of matter.
Instead of being merely part of the Virgo Cluster (formerly Virgo Supercluster), we are now officially part of a much larger Supercluster called Laniakea. Laniakea means “immeasurable heaven” in Hawaiian.
While the Virgo Cluster is 110 million light years across, containing 100 galaxy groups and clusters, Laniakea is 520 million light years across, and contains 100,000 galaxies.
By contract, our Milky Way Galaxy contains over 200 billion stars, and spans 120,000 light years.