The perception of Neptune as much darker and bluer than Uranus was "cemented" when pictures were sent back by the Voyager 2 probe after it flew by the two planets in 1986 and 1989, said The Times.

The image was assembled from three black and white images taken ... gaseous giant. Voyager 2 got within 50,600 miles of Uranus during its flyby. This photograph of Neptune was taken at a range ...

Humanity’s first close-up images from Neptune came 34 years ago from NASA’s Voyager 2 spacecraft. The images shows bright cirrus clouds high in its atmosphere above most of its methane.

Our ideas of the colours of the planets Neptune and Uranus have ... captured of both planets by Nasa's Voyager 2 spacecraft mission recorded its images in three separate colours.

Since then, the planet has only been visited once by spacecraft when, in 1989, Voyager 2 completed its 'Grand Tour' of our solar system's outermost planets. It took this image of Neptune and its moon ...