In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

This celestial body is surrounded by 4 rings, the outermost of which, 1989N1R, displays non-uniformity of particle density never before observed in the solar system. Visited by Voyager 2, the mission found it to be characterized by a bright feature dubbed the "scooter," an atmospheric storm called the "Great Dark Spot", and not 2 moons, as was previously believed, but rather 8, including Despina, Larissa, and Proteus. With an nearly circular orbital eccentricity of 0.009, FTP name this planet, usually the 8th in distance from the sun.
Science