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A dense ring of the trans-Neptunian object Quaoar outside its Roche limit

Olofsson, G.; Pagano, I.; Dhillon, V. S. +56 more

Planetary rings are observed not only around giant planets¹, but also around small bodies such as the Centaur Chariklo² and the dwarf planet Haumea³. Up to now, all known dense rings were located close enough to their parent bodies, being inside the Roche limit, where tidal forces prevent material with reasonable d…