Neptune’s “Great Dark Spot” –‘Jupiter Now has an Earth-Sized Rival’

Neptune's Great Dark Spot

 

Scientists first saw a Great Dark Spot on ice-giant Neptune in 1989, when NASA’s Voyager 2 probe flew past the mysterious blue planet. As the spacecraft zoomed by, it snapped pictures of two giant storms brewing in Neptune’s southern hemisphere. Scientists dubbed the storms “The Great Dark Spot” and “Dark Spot 2.” Just five years later, the Hubble Space Telescope took sharp images of Neptune that revealed both the Earth-sized Great Dark Spot and the smaller Dark Spot 2 had vanished.

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