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Last updated on April 21, 2014 at 1:20 EDT
Neptunes small dark spot D2
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Neptune's small dark spot (D2)

March 17, 2003
This bulls-eye view of Neptune's small dark spot (D2) was obtained by Voyager 2's narrow-angle camera. Banding surrounding the feature indicates unseen strong winds, while structures within the bright spot suggest both active upwelling of clouds and rotation about the center.