voyager2-neptune12.jpg

In this artist's impression of Voyager 2's 1989 encounter with Neptune, the gas giant's Great Dark Spot is visible in the distance. Thought to be a hole in the giant planet's cloud cover, winds in that area have been clocked at 1,500 miles per hour, the f (not the subject of this study) In this artist's impression of Voyager 2's 1989 encounter with Neptune, the gas giant's Great Dark Spot is visible in the distance. Thought to be a hole in the giant planet's cloud cover, winds in that area have been clocked at 1,500 miles per hour, the fastest in the solar system .