The ingredients of a cosmological mystery: Big Ring, Giant Arc, Sloan Great Wall, South Pole Wall, Clowes-Campusano Large Quasar Group, Laniakea Supercluster, the dark flow, Sir Roger Penrose's Conformal Cyclic Cosmology, cosmic strings, ...
https://www.space.com/big-ring-galactic-superstructure-celestial-anomaly

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An impossibly huge ring of galaxies might lead us to new physics. Here's how

The ring of galaxies, appropriately called the "Big Ring," has a circumference of nearly 4 billion light-years.

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