Mapping the Milky Way

… Is a gigantic task when you consider that the Milky Way galaxy is about 100,000 light years across, and our sun is 27,000 light years from the Galactic Center. We’re in a lonely part of the Milky Way, on the inner edge of a spiral called the Orion Arm. Yet the Milky Way galaxy is just one galaxy in a huge group of galaxies called a supercluster. A team of astronomers at the university of Hawaii have been mapping this supercluster. We now know that it’s 500 million light years in diameter and contains a hundred thousand galaxies. The Milky Way galaxy is located in the outskirts of this supercluster. Laniakea, our hone supercluster of galaxies.