NASA's Voyager 2 was the first spacecraft to see Neptune in all its gaseous glory, during a 1989 flyby. No other spacecraft have visited the icy, blue planet. So it's been three decades since ...

In the 1980s, NASA's Voyager made a flyby past Uranus and Neptune and helped scientists conclude that the two planets are rich in frozen water. Now, a new study has suggested that these planets ...