Giant GRB Ring

The Giant GRB Ring is nine gamma-ray bursts that fell within an area of the celestial sphere and within a redshift range over the course of 2004 to 2012. In 2015 the pattern was identified, with analysis that suggested a very low probability that it is a coincidence. If they are from a single astronomical object, it would be larger than any established object and large enough to challenge current cosmological theory: the cosmological principle suggests that given the universe's finite age, at any point in time, there is a maximum to the size of anything other than random, i.e., any possible large scale structure. All such discerned structures large enough to challenge the principle are immediately under suspicion but testing whether such a pattern is truly random (or not) is tricky.

• Redshift range: 0.785 to 0.859
• Implied distance: 2.24-2.36 Gpc (per Hubble constant of 70 km/s/Mpc)
• Angular dimensions: 43° × 30°