Hubble Peers into the Most Crowded Place in the Milky Way Posted on May 29, 2015 by Frank Cisco This NASA/ESA Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way. via NASA http://ift.tt/1FHM6qV Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related