>Before Voyager’s visit, partial rings, "ring arcs", had been detected around Neptune from Earth. The craft, however, found the planet to be completely encircled by rings, like the other gas giants. Some of these rings are diffuse, dusty discs, others have unevenly spaced clumps of dense material. These concentrations are a puzzle as the material should have spread uniformly through a particular ring in just a few years. Neptune's rings have been given names: the outermost is Adams (which contains three prominent arcs now named Liberty, Equality and Fraternity), next is an unnamed ring co-orbital with Galatea, then Leverrier (whose outer extensions are called Lassell and Arago), and finally the faint but broad Galle.