... Space Station and Space Shuttle: Backyard View . ... The Center of Globular Cluster Omega Centauri . ... To help answer this question, astronomers have been studying the center of the most massive ball of stars in our Milky Way Galaxy. In the center of globular cluster Omega Centauri, stars are packed in 10,000 times more densely than near our Sun. The Past of Asteroid Eros . ... But if our Sun were found within a star cluster, thousands of stars might occupy a similar space. ...