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The finding defies the current understanding of the physics behind ring formation. A University of Central Florida researcher has helped identify a ring around a trans-Neptunian object 4 billion miles away that defies the current understanding of the physics behind ring formation. The trans-Neptunian object, Quaoar, is a large enough candidate to be a dwarf planet. Researchers have found that its ring exceeds the Roche limit, or the minimum distance at which the gravitational forces of [...]