Astronomers have just added one more layer to the Earth's celestial address. You can now find us at:
Planet Earth, Solar System, Milky Way Galaxy, Local Group, Virgo Supercluster, Laniakea Galactic Supercluster
That last bit, the Laniakea Galactic Supercluster, was only recently defined, but it's the broadest galactic cluster to which our small planet belongs. According to a release from the National Radio Astronomy Observatory:
“We have finally established the contours that define the supercluster of galaxies we can call home,” said lead researcher R. Brent Tully, an astronomer at the University of Hawaii at Manoa. “This is not unlike finding out for the first time that your hometown is actually part of much larger country that borders other nations.”
In the video above, Nature explains how, like the division between two watersheds, the boundary was determined between the Laniakea supercluster and our nearest neighbor.