NeptuneFor the first time, images transmitted to Earth by NASA’s unmanned Voyager 2 space probe reveal visible cloud features in the atmosphere of Neptune, from a distance of 185,000,000 miles. This is a welcome relief to mission scientists who felt let down by a lamentable lack of any atmospheric detail in the clouds of Uranus, a planet visited by Voyager 2 in 1986. In the months ahead, even more detail will be revealed in Neptune’s upper atmosphere.