Neptune

Neptune is our Solar System's outermost planet, and the densest of them all. Thirteen moons orbit this ice giant planet, including Triton. When NASA’s Voyager 2 visited in 1989 it observed Neptune’s now famous Great Dark Spot, about the same size of Earth. Neptune has five rings of varying density and size, Galle, Le Verrier, Lassell, Arago and Adams, named after notable astronomers who studied the planet.

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