To test the theory, he hopes for high-pressure laboratory experiments replicating the conditions inside these planets. "If you ask my colleagues, 'What do you think explains the fields of Uranus and ...

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 ...

Kuiper Belt, well past the orbit of Neptune (artistic illustration). There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond ...