Despite a black-body temperature of 60 degrees Kelvin, its atmosphere is active, exhibiting the fast
Despite a black-body temperature of 60 degrees Kelvin, its atmosphere is active, exhibiting the fastest winds in the solar system.  With a color arising from methane absorption, it is also notable for its extremely clumpy ring system discovered in 1989 and a satellite in a retrograde orbit.  For 10 points, name this gas giant whose moons include Proteus, Nereid, and Triton.
Despite a black-body temperature of 60 degrees Kelvin, its atmosphere is active, exhibiting the fastest winds in the solar system.  
Neptune