Sloan Great Wall

The Sloan Great Wall (SGW), discovered in 2003 in Sloan Digital Sky Survey (SDSS) data, is a wall-like element of the universe's large scale structure. It is a billion light-years away, is 1.3 billion light-years across and appears in the southern sky, within the constellations Corvus, Hydra, and Centaurus. It includes several superclusters. It displaced the Great Wall as the largest known structure in the universe and was surpassed by the 2013 discovery of the Hercules-Corona Borealis Great Wall. It has been suggested the SGW is not actually a single structure but three structures in alignment.