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Astronomers at the University of Central Lancashire have discovered the Great Celestial Ring, a large-scale cosmological structure that is 9.2 billion light-years away from Earth and challenges current understanding of the universe. This is reported in a press release on Phys.org.
The structure has a diameter of about 1.3 billion light-years and a circumference of about 4 billion light-years. Its origin cannot be explained by baryonic acoustic oscillations (BAOs), which were fluctuations in the density of matter in the early universe and now look like giant hollow bubbles. The Great Ring is too large for BAOs and is not spherical in shape.