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Astronomers have identified a massive cosmic structure named that shouldn’t exist. Called the Big Ring, this enormous spiral is composed of galaxies and galaxy clusters that span 1.3 billion light-years in width, with a circumference of 4 billion light-years, ranking among the largest discovered cosmic objects.



Sources:
A Big Cosmological Mystery
https://www.uclan.ac.uk/news/big-ring...


Discovery of a Giant Arc in distant space adds to challenges to basic assumptions about the Universe
https://www.uclan.ac.uk/news/discover...


The clustering of gamma-ray bursts in the Hercules-Corona Borealis Great Wall: the largest structure in the Universe?
https://arxiv.org/abs/2008.03679


Time Domain Astronomy with the THESEUS Satellite
https://arxiv.org/abs/2104.09533


New data support the existence of the Hercules-Corona Borealis Great Wall
https://arxiv.org/abs/1510.01933


Re-Examining the Evidence of the Hercules-Corona-Borealis Great Wall
https://arxiv.org/abs/2006.00141


Cosmicflows-3: The South Pole Wall
https://iopscience.iop.org/article/10...


Possible structure in the GRB sky distribution at redshift two
https://ui.adsabs.harvard.edu/abs/201...


Logarithmic Maps of the Universe
https://www.astro.princeton.edu/unive...


Sheets and Voids
https://imagine.gsfc.nasa.gov/feature...


10 Largest Objects in the Universe
https://largest.org/nature/objects-un...


Future evolution of bound superclusters in an accelerating Universe
https://academic.oup.com/mnras/articl...