P-34668 Range : 2.8 million km. ( 1.7 million miles ) Smallest Resolvable Feature : 50 km or 31 miles This Voyager 2 image shows the last face on view of the Great Dark Spot that Voyager 2 will take with the narrow angle camera. It was made 45 hours before the closest approach to Neptune. the image shows feathery white clouds that overlie the boundary of the dark and light blue regions. the pinwheel ( spiral ) structure of both the dark boundary and the white cirrus suggest a storm system rotating counterclockwise. Periodic, small-scale patterns in the white clouds, possibly waves, are short-lived and do not persist from one Neptunian rotation to the next. This color composite was made from the clear and green filter images.