It wasn't long ago that humans believed they were the center of the universe.  Now we have even more proof of how vast the cosmos stretches with a new study that involves the mapping of thousands of nearby galaxies.  Referred to as Laniakea, the supercluster contains more than 100,000 galaxies and stretches 500 million light years across. Our Milkyway is but a speck in this vast supercluster and each galaxy contains millions, perhaps billions of stars similar to our sun.  Check out this amazing clip for a high-definition look at these galaxies in action.