Which planet has 5 rings that are named for the astronomers Johann Gottfried Galle, Urbain Le Verrier, William Lassell, François Arago and John Couch Adams?
Neptune also has a faint unnamed ring coincident with the orbit of its moon Galatea.
Which planet has a year of 687 days, a day of 24 hours 37 minutes, a diameter twice that of the moon and a mass one tenth of the earth?
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