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Great Dark Spot - Wikipedia
Mysterious dark spot detected on Neptune | CNN
Mystery of Neptune dark spot solved. New white spot found
Hubble Tracks the Lifecycle of Giant Storms on Neptune - NASA
Neptune Great Dark Spot in High Resolution - NASA Jet …
Mysterious Neptune dark spot detected from Earth for the first time
What's going on with Neptune? - Popular Science
Neptune Dark Spot - HubbleSite
Neptune Facts - Science@NASA
What is the Great Dark Spot? - Cool Cosmos