Hercules–Corona Borealis Great Wall
Between the years of 1997 to 2012, astronomers mapped these bursts in the sky, with the help of the robotic satellites Swift and Fermi which look for gamma-ray bursts and measure their redshifts. In the map they produced, they noticed something interesting; 14 gamma-ray bursts have very similar redshifts and are very close to each other. This means that there is a very large group of galaxies and matter in the region. They say, measuring these bursts comes up with a very large structure measuring 10 billion light-years in diameter.