The Hercules–Corona Borealis Great Wall or the Great Wall is the largest known structure in the observable universe, measuring approximately 10 billion light-years in length. It is discovered in November 2013. This object is a galactic filament, a vast group of galaxies bound together by gravity, about 10 billion light-years away. The biggest single entity that scientists have identified in the universe is a supercluster of galaxies called the Hercules-Corona Borealis Great Wall. It's so wide that light takes about 10 billion years to move across the entire structure. For perspective, the universe is only 13.8 billion years old. It is a huge group of galaxies forming a giant sheet-like pattern which is about 10 billion light-years long, 7.2 billion light-years wide, and almost 1 billion light-years thick. It is about 10 billion light-years away in the constellations of Hercules and Corona Borealis, hence its name. Its existence was discovered by astronomers charting the locations of gamma ray bursts which had been detected by the Swift Gamma Ray Burst mission.

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