Our ideas of the colours of the planets Neptune and Uranus have been wrong, research led by UK astronomers reveals. Images from a space mission in the 1980s showed Neptune to be a rich blue and ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

In 1986 and 1989, Voyager 2 made the final two stops on its grand tour of the outer solar system when it swept by Uranus and Neptune, respectively. Now, nearly 40 years later, the archive of data ...